12 Questions
| Attempts: 473

Questions and Answers

- 1.Define rotational inertia.
- A.
The property of an object to resist change.

- B.
The property of an object to resist change in a linear motion.

- C.
The property of an object to resist change in a rotational motion.

- 2.Define tangential speed.
- A.
A measurement that measures distance travelled per unit of time in circular motion.

- B.
A measurement that measures the number of rotation per unit of time in a circle motion.

- C.
A MEASUREMENT THAT MEASURES HOW MUCH FORCE WAS APPLIED TO A ROTATION.

- 3.Circle the correct statement based on this situation. You apply 27N of force on a wrench.
- A.
As you decrease the radius where you apply the force, you will increase the torque of the wrench/

- B.
As you increase the radius where you apply the force, you will decrease the torque of the wrench.

- C.
As you decrease the radius where you apply the force, you will decrease the torque of the wrench.

- 4.Put a pipe over the end of a wrench when trying to turn a stubborn nut on a bolt, to effectively make the wrench handle twice as long, you'll multiply the torque by...
- A.
1

- B.
2

- C.
4

- 5.On a merry-go-round, horse A has a radius from the center of 10m while horse B has a radius from the center of 15m. Which horse has a greater rotational speed?
- A.
Horse A

- B.
Horse B

- C.
Neither

- 6.Toss a baseball bat into the air and it wobbles about its
- A.
Geometrical center

- B.
Center of mass

- C.
Heavier end

- 7.When a twirling ice skater brings her arms inward, her rotational speed
- A.
Increases

- B.
Decreases

- C.
Remains the same

- 8.As rotational speed of a merry-go-round increases by 2, what will happen to tangential speed?
- A.
Decrease by 1/4

- B.
Decrease by 1/2

- C.
Increase by 2

- 9.At point C on the merry-go-round the tangential speed is .2 m/s how can point C double the speed to .4m/s
- A.
Increase rotational speed by 2

- B.
Decrease the rotational speed by 1/2

- C.
Increase the rotational speed by 4

- 10.A torque acting on an object tends to produce
- A.
Equillibrium

- B.
Rotation

- C.
Linear motion

- 11.On a balanced see-saw, a cow is three times as heavy as his partner sits
- A.
1/3 the distance from the fulcrum

- B.
Less than 1/3 the distance from the fulcru.

- C.
More than 1/3 the distance from the fulcrum

- 12.Two people are balanced on a see-saw. If one person leans toward the center of the see-saw, that person's end of the see-saw will
- A.
Rise

- B.
Fall

- C.
Stay at the same level

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