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- 1. Multiple Choice
Torque is define as cross product between distance, r and __________
energy
velocity
force
displacement
- 2. Multiple Choice
If a system is in static equilibrium, it must have the following 2 conditions:
∑τ=0
Constant acceleration
∑F=0
Positive forces only
- 3. 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
- 4. Multiple Choice
Condition for maximum torque is
= 90 degree
=180 degree
= 0 degree
not defined
- 5. Multiple Choice
Torque depends on
force
moment arm
mass
force and moment arm
- 6. Multiple Choice
All the forces rotating clockwise will have a _______ torque
positive
negative
- 7. Multiple Choice
The formula used to find a torque is...
(m)(g)
(F) cos(Ɵ)
(F)(r)( sin )
(m)(a)
- 8. Multiple Choice
A body with a definite shape that doesn't change is:
period
angular acceleration
rigid body
radius of gyration
- 9. Multiple Choice
Which of the following is true about a rotating rigid body
Its centre of rotation is at rest
The centre of rotation is at the centre of mass
All points on the body are moving with the same linear velocity
Every points in the body are moving with the same angular velocity
- 10. Multiple ChoiceWhich will produce more torque to loosen the lug nut?ABThey are the same
- 11. Multiple ChoiceA merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it is true to say thatthe moment of inertia of the system increases and the angular speed increases.the moment of inertia of the system decreases and the angular speed remains the same.the moment of inertia of the system decreases and the angular speed decreases.the moment of inertia of the system decreases and the angular speed increases.
- 12. 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
- 13. 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.
- 14. Multiple Choice
Which of these items is easier to turn?
Left
Right
Both are just as easy to turn
- 15. Multiple ChoiceAccording to the Law of Conservation of Angular Momentum, if I (momentum of inertia) increases, what will happen to ω?DecreaseStay the sameIncrease
- 16. Multiple Choice
What force does not cause any torque?
Force perpendicular to the fulcrum.
Force horizontal to the planck.
Force slightly off center of the fulcrum
Forces at a 45 degree angle to the fulcrum, and not on the fulcrum
- 17. Multiple ChoiceA construction worker is worried about applying too much torque to a bolt using his wrench. What could he do to reduce his torque on the bolt?Increase the length of the wrenchIncrease the force on wrenchReduce the length of the wrenchReduce the friction between the bolt and wrench
- 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 Choice
You and a friend are playing on the merry- go-round. You stand at the outer edge of the merry-go-round and your friend stands halfway between the outer edge and the center. Assume the rotation rate of the merry-go-round is constant. Who has the greatest angular velocity?
You
Same
Your friend
- 20. Multiple Choice
You and a friend are playing on the merry- go-round. You stand at the outer edge of the merry-go-round and your friend stands halfway between the outer edge and the center. Assume the rotation rate of the merry-go-round is constant. Who has the greatest tangential velocity?
You
Your friend
Same
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