3. A person stands on a force plate, which is then tared, and begins to move. PA

Question

3. A person stands on a force plate, which is then tared, and begins to move. PART of the resulting F() graph is shown below. Which of the following motions could possibly describe the graph shown? 200 150 100 50 H -100 -150 - 200 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 t [s a. The person is moving down and slowing down b. The person is moving down and speeding up c. The person is moving up and slowing down-C is correct d. The person is moving up and speeding up ? Also full credit as there is an intorpretation where this is correct e. The person is back at rest

Explanation / Answer

c and d are possible.

because, we know,

Impulse = area under F-t curve

= from the graph it is a postive value

we know, impulse = change in momentum

so, change in momentum = positive value

it means if the body moving down it has to be slow down.

if the moving up the body has to be speed up.

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