Question
Asked Jan 23, 2020
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Consider the following 3 pieces of the motion for a block that is initially at rest on a floor. (1) The block's velocity is zero at the instant it is given a quick push by a hand. (2) The hand does not touch the block after the quick push. The block slides across the floor, gradually slows down, then comes to rest. In (3), the block is at rest. The next series of questions will pertain to these cases.

In (2), after the hand has let go but while the block moves, what is the direction of the net force on the block?

 

is at rest
Quick push
Slowing down
direction of
motion
|(3)
|(1)
(2)
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is at rest Quick push Slowing down direction of motion |(3) |(1) (2)

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Expert Answer

Step 1

The free body diagram for each cases,

Physics homework question answer, step 1, image 1
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Step 2

The force applied by the hand,

Physics homework question answer, step 2, image 1
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Step 3

The weigh...

Physics homework question answer, step 3, image 1
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Science

Physics

Friction

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