Reading Quiz

Question 1:

Answer:

1. a)translational motion is the overall movement of an object from one place to another, an example of this is dropping a ball. b)rotational motion is motion around a fixed point (which prevents translation), an example of this is the hands of a clock which experience rotational motion as they go around in a circle. c)an example of something that commonly undergoes translational and rotational motion is the motion of the seesaw, the pivot is translational motion and the up and down movement is the rotational motion.
2. Translational Motion is movement of an object from one plance to another. An example would be a lever. Rotational Motion is movement around a fixed point. An example would be turning on and off the faucet. An example of both would be a lever turning around a fixed point like a spickett.
3. (a) Translational motion is overall movement from one place to another. An example of this would be a person leaving the physics classroom and going into the hall. (b) Rotational motion is motion around a fixed point. An example would be a globe of the earth. (c) A spinning top
4. a) translational motion is overall movement of an object from one location to another. For example, a mouse moving around on a mousepad is undergoing translational motion. b) rotational motion is motion around a fixed point. For example, a ferris wheel with stationary cars undergoes rotational movement. c) A merry-go-round undergoes translational and rotational motion; the merry-go-round itself can only move in a circle and experiences rotational movement, while the horses moving up and down experience translational movement.
5. a. Translational motion is the movement of an obect from one location to other. An example is a falling book. b. Rotational motion is the motion of an object around a fixed point. An example is the earth. c. Something that undergoes both types of motion is a football once the quarterback throws it.
6. a) Translational motion is movement from one point to another. A train usually only undergoes translational motion. b) Rotational motion is motion about a fixed point. Clothes in a washing machine or dryer usually undergo rotational motion. c) Rolling a ball down a street exhibits translational mation in its movement from one point to another on the street as well as rotational motion in it movement about its center causing the rolling.
7. Translational motion is the motion of something from one place to another. Throwing a ball out of my window. roatational motion is movement around a fixed point. Holding my little sister by her ankles and swinging her in a circle around me. Throwing a football. it travels from one place to another, but if thrown with a spiral, it also spins along the axis running from the point in front to the point in back.
8. a.) Translational motion is the motion of an object in space which is not fixed around one position but rather moves independently in whichever direction. Ex. a Car driving. b.) Rotational motion is the motion of an object around a fixed pivot point, the pivot point itself remains stationary. Ex. a spinning fan. C.) The propeller of an airplane undergoes both, rotational because the blades are spinning and translational because the entire aircraft is moving.
9. (a) Translational motion is the overall movement of an object from one place to another. A car performs translational motion when it travels in a straight line. (b) Rotational motion is motion around a fixed point. A merry-go-round undergoes rotational motion. (c) A heliocopter's blades undergo rotational motion, but moves translationally as well.
10. Translational motion is when an object just moves side to side or up and down, like an elevator. Rotational motion is when an object spins around a center axis. An example of this is a spinning top. A baseball after its been thrown undergoes translational and rotational motion.
11. Translational motion is the overall movement of an object from one place to another. Example: a car Rotational motion is motion around a fixed point. Example: hands of a clock A roller coaster.
12. translational motion is when a object moves from one place to another. Ex: a skateboard rolls across the room. Rotational motion is motion around a fixed point . Ex: a dredal. An example of something that moves in both directions is a basketball. You put spin on it as you shoot and it also goes from one place to another.
13. (a)Translational motion is when an object moves on a straight or curved line. An example of this, is a round ball being thrown up in the air. (b)Rotational motion is when an object rotates around an axis, where its position does not change. An example of this, is a windmill. (c)I think an example of an object that undergoes both, is a roller coaster (which has some loops in it)
14. A - translational motion is teh overall movement of an object from one place to another. Car's undergo translational motion often B - Rotational motion is motion around a fixed point. A swing on a swing set undergoes rotational motion. C - The wheel of a car undergoes both translational and rotational motion
15. a.) Translational motion is something that just changes its location, not its orientation, like a car moving down the road some distance. b.)A cap on a water bottle c.)A pitched baseball- it moves in space but it is also spinning as it moves from the mound to the plate.
16. Translational motion is the movement of something from one place to another, one thing that does this is a car. Rotational motion is something that moves around a fixed point, one example of this is a carousel. A wheel undergoes both rotational motion and translational because it moves from place to place but also moves around in a circle to do so.
17. translational motion- overall motion from one object to another ex. falling bodies rotational motion- motion around a fixed point ex. the planets! both- ex. yo-yo
18. Translational motion occurs when an object moves from one point to another. For example a hockey puck undergoes only translational motion as it slides across the ice. Rotational motion occurs when the motion is around a set point that does not move. For example a ferris wheel undergoes only rotational motion. One example of something that undergoes both translational and rotational motion would be a hanging roller coaster in which the cars move along the track, but they are also free to rotate about thier overhead pivot point.
19. a) translational motion is movement of an object from one place to another. A car usually only undergoes translational motion. b) rotational motion is movement of an object spinning around a central rotation point. Hands on a clock usually undergo only rotational motion. c) a ball or frisbee usually undergo translational and rotational motion.
20. a) a car undergoes translational motion. b) a fan uses rotational motion. c) a propeller uses both translational and rotational motion.
21. Translational motion is the overall movement of an object from one place to another and an example of something that usually only undergoes translational motion is a ball being dropped. Rotational motion is motion around a fixed point, which prevents translation, and an example of this are the hands of a clock as they go around in a circle. I'm not really sure what an example of something that undergoes both translational and rotational motion: maybe a dangling seesaw?
22. a) the overall movement of an object from one place to another. Ex. when moving a box. b) the motion around a fixed point (which prevents translational motion). Ex. the hands on a clock. c) a basketball could undergo both translational and rotational motion.
23. Translational motion is the overall movement of an object from one place to another. An example of something undergoing this motion would be a ball flying through the air. Rotational motion is motion around a fixed point. An example of this would be the hands of a clock moving around their fized point in the center, or a swing set. An example of an object that undergoes both would be a football. When a football is thrown, it moves so it has translational motion, and it spins with a spiral motion around its axis, so it also has rotational motion.

Question 2:

Answer:

1. a) velocity b) acceleration c) outside forces, (friction) d)geometric center, depends on the mass distribution (not sure about this one)
2. Angular Velocity: Speed. Radian Per Second 1/s Angular Acceleration: Acceleration. Radian Per Second Squared (1/s2) Torque: Position. Newton Meter N/m Rotational Mass: Velocity. Kilogram Meter2 kgm2
3. (a) angular velocity corresponds to velocity and has units m/s (b) angular acceleration corresponds to acceleration and has units m/s^2 (c) torque corresponds to work and has units of N*m (d) rotational mass corresponds to mass and has units kg
4. a) angular velocity corresponds to velocity; the unit is the radian per second (1/s). b) angular acceleration corresponds to acceleration; I believe the unit should be radian per second squared (1/s^2). c) I think torque corresponds to rotational motion; the unit is the newton-meter (N*m). d) rotational mass corresponds with mass; the unit is the kilogram-meter^2 (kg*m^2).
5. a. angular velocity (radian per second) - velocity (m/s) b. angular acceleration (radian per second squared) - acceleration (m/s^2) c. torque (newton meter) - force (newton meter) d. rotational mass (kilogram meter^2) - mass (kg)
6. a) velocity; units: radian-per-second (1/s) b) acceleration; units: radian-per-second^2 (1/s^2) c) force; units: newton-meter d) inertia; units: kilogram-meter^2
7. Angular velocity: velocity m/s Angular acceleration: acceleration: m/s (squared) Torque: NtM, acceleration Rotational mass: mass, Kg
8. A.) Angular velocity - Velocity - radian-per-second (1/s) B.) Angular Acceleration - acceleration - radian-per-second squared (1/s^2) C.) Torque - force - newton-meter D.) Rotational mass - mass - kg meters squared
9. (a) velocity (b) acceleration (c) force (d) mass
10. angular velocity, measured in radians/sec corresponds to velocity. Angular acceleration, measured in radians/sec2 corresponds to acceleration. Torque is measured in Nm and corresponds to force. Rotational mass, measured in kgm2 corresponds to mass.
11. a) corresponds to velocity b) corresponds to acceleration c) corresponds to angular momentum d) corresponds to inertia
12. a) velocity b)acceleration c) force d) mass
13. (a)velocity (b)acceleration (c)force (d)mass
14. A - angular velocity (radian-per-second(1/s)) relates to velocity B - angular acceleration (radian-per-second^2(1/s^2)) relates to acceleratoin C - Torque (Newton-meter (Nm)) relates to a force vector D - rotational mass (kilogram-meter^2) relates to mass
15. a.)regular linear velocity b.)linear acceleration c.)force d.)mass
16. Angular velocity is the same as linear velocity, angular velocity is measured in radian/s. Angular acceleration is the same as linear acceleration and is measured in radian per second ^2. Torque is the same as the force is takes to start something in motion (work), this is measured in Newton meters. Rotational mass is the same as weight and is measured in kg-m.
17. a) velocity, m/s b) acceleration, m/s^2 c) torque, Newton-meter d) rotational mass, kg
18. (a) velocity -- angular velocity is measured in radians/sec (1/s) (b) acceleration -- angular acceleration is in radians/sec2 (1/s2) (c) force -- torque is measured in N m (d) inertia -- rotational mass is measures in kg m2
19. a)radian-per-second ...linear velocity b)radian-per-second-per-second ...linear acceleration c)newton*meter ...force d)kilogram*meter^2 ...mass
20. a) velocity, radians/second b) acceleration, radians/second squared c) force, Newton x meter d) inertia, kilogram x meter^2
21. angular velocity -- velocity, m/s angular acceleration -- acceleration, m/s^2 rotational mass -- mass and mass distribution
22. a) angular velocity (radian-per-second--1/s) corresponds to linear velocity. b)angular acceleration (radian-per-second2--1/s2) corresponds to linear acceleration. c) torque (newton-meter--Nm) corresponds to a force in translational motion. d) rotational mass (kilogram-meter2--kgm2) corresponds to an object's moment of inertia.
23. a)velocity m/s b)acceleration m/s2 c)force N d)mass kg

Question 3:

Answer:

1. Torque is an influence that if exerted on a free body results chiefly in an angular acceleration of the body. A torque is a vector quantity, consisting of both the amount of torque and its direction. It is a technical term for twists and spins.
2. Torque influences objects to twist and spin, or move in a spontaneous way. Torque is outside influences that cause twists and spins on objects.
3. Torque sets an object into rotational motion. Torque is the length of the lever arm multiplied by the force perpendicular to the lever arm.
4. Torque causes a change in the angular velocity of an object. It is a vector quantity of rotational motion, which means it has both a magnitude and a direction.
5. Torques change the angular acceleration of an object. It is a vetor quantity that has magnitude and direction.
6. Torque is an outside influence like twists or spins which affects how rapidly an object's angular velocity changes. Torque is a vector quantity with both magnitude and direction which causes the angular acceleration of an object.
7. Torque is the change in angular velocity (rotational mass x angular acceleration) torque is the amount of force that you use to turn an object.
8. Torque is essentially the equivalent of a Force in a problem involving rotation. Torque is the product of a force perpendicular to a lever multiplied by the length of that lever.
9. Torque is the twisting effect of a force. Torques can speed a rotating body up, slow a rotating body down, or change the axis of the object's rotation.
10. Torque is a vector quantity consisting of both the amount of torque and its direction. Torque, when exerted on a body, results in angular acceleration.
11. A torque is "a technical term for twists and spins". It helps us understand Newton's first law of rotational motion. It states that a rigid object that is not wobbling and is not subject to any outside influences (which are torques) rotates at a constant angular velocity.
12. torques twist or spin objects. It is the lever arm multiplied by the force perpendicular to the lever arm.
13. Torque causes acceleration. Torque is a vector quantity that consists of how much force is exerted on an object and its direction.
14. Torque rotates objectes. Torque is a force that only occures when it is directed in a circular motion around a central point.
15. Torque is a force with direction- it makes things spin.
16. Torque is the work that is done to make a rotating object start moving, or change directions, or accelerate.
17. torque- twists and turns, it causes things to rotate
18. A torque is what changes an object's angular velocity in some way. Torque is measured as the product of the distance from the pivot to where a force is exerted and the amount of the force exerted that is perpendicular to the lever arm of the object.
19. A torque is a kind of force which results in angular acceleration, or a twist or spin exerted on an object.
20. torque is the outside influence that starts the rotational motion of an object.
21. Torque has both a magnitude and a direction (meaning it is a vector quantity). Depending on the amount of the torque you exert, you can affect the angular velocity of an object. Depending on the direction of the torque you exert, you can affect the the rotational speed.
22. A force can produce a torque and a torque can produce a force. A torque can change the angular velocity of an object. The more torque you exert on an object, the more rapidly its angular velocity changes. Torque is a vector quanitity of rotational motion, it has both magnitude and direction.
23. Torques prevent a rigid object from rotating at a constant angular velocty. Torques are twists or spins created by an outside force.

Question 4:

Answer:

1. I had trouble understanding the concept of center of mass, how u would find it, and what it actually demonstrates. Could you also give us an example of the right hand rule to make sure i understood it correctly.
2. Could we go over the different rotational quantities again.
3. I didn't understand the right-hand rule.
4. None.
5. I think everything was pretty clear. Everythiing is the same as the previous chapter, but it rotates instead of being in a straight line.
6. I am still confused about the relationship between torque and force, and how to use torque in problems. Can you also clarify the right-hand rule?
8. I understood it very well.
9. the right-hand rule. the way they have the fingers curling in the example don't seem to follow the object's rotation.
10. I thought the descriptions and the introduction of new terms one after another made the reading confusing to follow.
11. The concept of the net torque.
12. i think i understand this stuff pretty well
13. I think I understand most of this. It is helpful to see the connections with translational quantities.
14. I would like a general review of the concepts pertaining to rotational motion. The general principals and equations are always nice to review right after having read them.
15. I'm a little fuzzy on the exact differences between the force you put on an object and the torque.I guess I always thought that the torque you put on something was the same as putting force on it, just that torque meant it rotated instead of went in a straight line, but I feel like there's some subtle difference I'm missing.
16. I don't really understand torque all that well.
17. None :)
18. I think I got everything from this reading, as it presented the same concepts as in the previous chapter, but applied to rotational instead of translational motion.
19. the directions of forces and torques (the right hand rule)
20. --
21. rotational quantities
22. I was able to understand everything from the reading...it related a lot to the previous chapeter.

Question 5:

Answer:

1. As of now, i cant think of any questions on the previously learned material.
2. nothing at this time.
3. Everything is pretty clear.
4. Splitting up the horizontal and vertical velocity of an object in motion.
5. Nothing.
6. I am clear on previous material.
8. I think I understand everything right now.
9. vectors and finding an equilibrium to balance
10. Just keeping negatives straight - when direction is negative and when it is positive.
11. none
12. i was having a little dificulty with some of the elevator stuff on the homework
13. I'm feeling much better about the previous material, thank you!
14. After reviewing the homework question about jumping in an elevator, I was more confused about this question than when I first answered it.
16. Nothing really! Good so far!
17. None
18. I understand the material so far.
19. seems to be okay
20. --
21. not really anything in particular. just need to review the material as a whole.
22. I think I understand everything from class.