The net work done on a crate as it is sliding down a ramp is zero. Which of the

ID: 1771536 • Letter: T

Question

The net work done on a crate as it is sliding down a ramp is zero. Which of the following statements always holds?

a.) The work done by the force of friction is positive.

b.) The work done by the force of gravity is negative.

c.) A worker must be applying a force on the crate which has a component in the direction up the ramp in order to keep the crate from accelerating.

d.) The crate is sliding down the ramp at constant speed.

e.) The net work is zero because the normal force is doing no work.

here,

for a crate sliding down the ramp

The net work done on a crate as it is sliding down a ramp is zero

so, the net force on the crate is zero

and the accelration of crate is also zero

then, d.) The crate is sliding down the ramp at constant speed.

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