Rotational Dynamics Torque
8 months ago
coscephysics
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16 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    If the net torque on an object is 0, then the object will

    answer choices

    not rotate or rotate at a constant angular velocity.

    rotate with a constant angular acceleration.

    not rotate or move in a straight line.

    not move in a straight line.

  • Question 2
    30 seconds
    Q.

    If a net torque is applied to an object, that object will experience which of the following? (A net torque means a net torque that is NOT 0!)

    answer choices

    A constant angular speed

    A constant moment of inertia

    An angular acceleration

    An increasing moment of inertia

  • Question 3
    30 seconds
    Q.

    Which of the following statements is correct?

    answer choices

    The closer the force is to the axis of rotation, the easier it is to rotate the object.

    The closer the force is to the axis of rotation, the more torque that is produced.

    The farther the force is to the axis of rotation, the less torque that is produced.

    The farther the force is to the axis of rotation, the more torque that is produced.

  • Question 4
    30 seconds
    Q.

    At what angle should the force be applied to a wrench to produce the maximum torque?

    answer choices

    00 to the handle

    900 to the handle

    1800 to the handle

    3600 to the handle

  • Question 5
    30 seconds
    Q.

    Suppose a doorknob is placed at the center of a door. Compared with a door whose knob is located at the edge, what amount of force must be applied to this door to produce the torque needed to open it?

    answer choices

    1/4 as much

    1/2 as much

    Twice as much

    Four times as much

  • Question 6
    30 seconds
    Q.

    If you want to open a swinging door with the least amount of force, where should you push on the door?

    answer choices

    As far from the hinges as possible

    Close to the hinges

    In the middle

    It does not matter where you push

  • Question 7
    30 seconds
    Q.

    If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do?

    answer choices

    Exert a force on the wrench closer o the bolt

    Tie a rope to the end of the wrench and pull

    Use a wrench with a longer handle

    Use a wrench with a shorter handle

  • Question 8
    30 seconds
    Q.

    At which point along a claw hammer is the center of mass best located?

    answer choices

    In the middle of the handle

    Close to the end of the handle without the head

    Close to the head end of the handle

  • Question 9
    30 seconds
    Q.

    Which of the following affects the total kinetic energy of a football thrown with a spinning motion?

    answer choices

    The ball's angular speed only

    The ball's linear speed only

    Both the linear and angular speeds

    Neither the linear nor the angular speeds

  • Question 10
    30 seconds
    Q.

    What is the point at which all of the mass of the body and be considered to be concentrated?

    answer choices

    Center of Mass

    Moment of Inertia

    Rotational Equilibrium

    Torque

  • Question 11
    30 seconds
    Q.

    A point mass and a solid cylinder have the same mass and radius. How much more rotational kinetic energy does the point mass have than the solid cylinder if they are both spinning about their symmetry axes with the same angular speed?

    answer choices

    Half as much

    They have he same amount of rotational kinetic energy

    Twice as much

    Four times as much

  • Question 12
    30 seconds
    Q.

    What must be true in order for an object to be in both translational and rotational equilibrium?

    answer choices

    The acceleration is zero.

    The angular acceleration is zero.

    The acceleration and angular acceleration are zero.

    The velocity and angular velocity are zero.

  • Question 13
    30 seconds
    Q.

    What is defined as a twist or turn, which causes an angular acceleration?

    answer choices

    Angular Momentum

    Center of Mass

    Force

    Torque

  • Question 14
    30 seconds
    Q.

    What is the measure of the resistance of an object to change its rotational motion?

    answer choices

    Center of Mass

    Moment of Inertia

    Rotational Equilibrium

    Torque

  • Question 15
    30 seconds
    Q.

    Which of the following does NOT affect an objects moment of inertia?

    answer choices

    Mass

    Size

    Shape

    Way it is rotating

    Rotational Velocity

  • Question 16
    30 seconds
    Q.

    An ice skater is spinning in a circle with his arms extended out. He then brings his arms in, what happens to his rotational velocity?

    answer choices

    It increases

    It decreases

    It stays the same

    He stops spinning immediately

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