A block is pushed at a constant speed up a ramp from point A to point B. The for

Question

A block is pushed at a constant speed up a ramp from point A to point B. The force on the block by the hand is directed horiztonal. There is friction between the block and the ramp. The distance between points A and B is 1 meter.

b) The work on the block done by the normal force___

c) the work done on the block by the gravitational force of the earth at the block slides from A to B____

d) The work done on the block by the hand as the block moves from A to B_____

e) The work done on the lbock by the friction force from the ramp as the block moves from A

to B____

1. is zero

2. is negative

3. is positive

4. can be either positive or negative depending on the coordinate system chosen

Explanation / Answer

b) is zero
c) is negative
d) is positive
e) is negative

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