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- 1. Multiple Choice
Which would have a greater linear velocity?Kid near the center of the merry go roundKid near the outside of the merry go roundneither - 2. Multiple Choice
What happens to her rotational inertia, also called the moment of inertia, when a figure skater brings in her arms?
Increase her rotational inertia
Decrease her rotational inertia
has no affect
- 3. Multiple ChoiceWhy are you more stable when riding a bicycle at a faster speed?You have more massThe wheels have angular momentumIt's not easier to ride at a faster speedThe bike has more momentum
- 4. Multiple ChoiceWhat happens to her angular velocity when a figure skater brings in her arms?Increases her angular velocityDecreases her angular velocityHas no affect
- 5. Multiple Choice
What does the rotational inertia/moment of inertia describe?
The average position of mass in an extended object.
How the mass of an object is distributed
How a force can rotate an object.
The tendency of an object to move in a straight line.
- 6. Multiple ChoiceA disc rotates through 20 rotations in 5 seconds. If the disc starts from rest, what is the angular velocity?5 rotations/s100 rotations/s4 rotations/s10 rotations/s
- 7. Multiple Choice
What is happening to the ice skater?
Decreased Angular velocity, decreased rotational inertia
Decreased Angular velocity, increased rotational inertia
Increased Angular velocity, increased rotational inertia
Increased Angular velocity, decreased rotational inertia
- 8. Multiple Choice
How many radians make up one revolution of 360 degrees?
π/2
π
2π
3π/2
- 9. Multiple Choice
What does Rotational Inertia depend on?
Mass
Mass Distribution
Both Mass and its Distribution
Neither Mass nor its distribution
- 10. Multiple Choice
Which of these items is easier to turn?
Left
Right
Both are just as easy to turn
- 11. Multiple Choice
A wrench is used to tighten a nut. A 25N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
10.0 Nm
12.5 Nm
750 Nm
150 Nm
- 12. Multiple ChoiceThe easiest way to open a heavy door is by applying the forceNear the hingesIn the middle of the doorAt the edge of the door far from the hingesAt the top of the door
- 13. Multiple Choice
A 1000N man is playing on a seesaw with son who has a weight of 250N. If the child is sitting 4 meters away, how far will the man have to sit to balance the seesaw?
0.75m
3m
1.5m
1m
- 14. Multiple ChoiceWhat is the Unit for TorqueNmNWJ
- 15. Multiple ChoiceTorque is the product of a force exerted on an object times the lever arm.TrueFalse
- 16. Multiple ChoiceWhen an object is experiencing a net torqueit is in dynamic equilibrium.it is in static equilibrium.it is rotating.it is translating.
- 17. Multiple Choice
A state of equilibrium is also seen below. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the cars on the right-hand side, are ____meters from the fulcrum.
4.5 m
3 m
1 m
2 m
- 18. Multiple ChoiceA seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?The larger person moving further away from the center.Moving the smaller person closer to the center.Moving the smaller person further from the center.Making the larger person do nothing.
- 19. Multiple ChoiceWhich will produce more torque to loosen the lug nut?ABThey are the same
- 20. Multiple ChoiceWhat does this formula measure?moment of inertiaimpulseelectric currentangular momentum
- 21. Multiple ChoiceAccording to the Law of Conservation of Angular Momentum, if I (momentum of inertia) increases, what will happen to ω?DecreaseStay the sameIncrease
- 22. Multiple Choice
Angular Momentum is the product of...
rotational inertia and linear velocity.
linear inertia and angular velocity.
linear momentum and angular velocity
rotational inertia and angular velocity.
- 23. Multiple Choice
Rotational inertia equals to
- 24. Multiple Choice
Which of the pistons in the image produces more torque?
Short Stroke
Long Stroke
Square
They are al the same torque
- 25. Multiple Choice
Which of the pistons in the image best represents a diesel engine?
Short Stroke
Long Stroke
Square
- 26. Multiple Choice
Why are these soldiers using a cheater pipe/bar?
It increases the torque by increasing the radius.
It decreases the torque by increasing the radius.
It increases the torque by decreasing the radius.
It's fun and cool to cheat.
- 27. Fill in the Blank
A helicopter uses it tail rotor to compensate for _______.
- 28. Fill in the Blank
Without a tail rotor, a helicopter would start
- 29. Multiple Choice
Which has the greater angular velocity?
A
B
- 30. Multiple Choice
Which has the greater moment of inertia?
A
B
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