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A force P pulls on a crate of mass m tha...

A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. W represents the weight of the crate. Fy represents the normal force on the crate, and F represents the frictional force.

Which statement best describes the motion of the crate?

A

The crate must be at rest

B

The crate must be moving with constant velocity.

C

The crate must be moving with constant acceleration.

D

The crate may be either at rest or moving with constant velocity

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. W represents the weight of the crate. Fy represents the normal force on the crate, and F represents the frictional force. What is the magnitude of F, the normal force on the crate?

    A
    57 N
    B
    160 N
    C
    230 N
    D
    80 N

  • In the above problem, the contact force between the man and the crate is

    A
    2250N
    B
    1125N
    C
    750N
    D
    375N

  • A block is pulled along a rough level surface at constant speed by the force vecP . The figure shows the free-body diagram for the block. vecF_(N) represents the normal force on the block, and vecf represents the force of kinetic friction What is the magnitude of vec(F_N) ?

    A
    What is the magnitude of ?
    B
    2mg
    C
    f
    D
    P

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