1) Describe the force you would apply to an object on a very low frictio n track

Question

1) Describe the force you would apply to an object on a very low friction track to produce the following velocity vs. time graph. Include the direction of the force and whether it is changing (for example, increasing or decreasing), constant or anything else relevant to the motion. Explain your reasoning. 2) Explain the force you would apply to an object on a very low friction track to produce the following acceleration vs. time graph. Include the direction of the force and whether it is changing (for example, increasing or decreasing), constant, or anything else relevant to the motion. Explain your reasoning. Please explain your reasoning and be very descriptive in your answer.

Explanation / Answer

1)

from the graph,

slope=v/t=acceleration(a) is constant

therefore, applied force (F=m*a) must be constant

and to move the body applied force should be greater than the friction

and

here, initially the direction of the force is opposite to the body motion

after some time velocity becomes zero and

then direction of force becomes reverese.

2)

from the graph,

acceleration(a) is constant,

therefore force(F=m*a) is also constant,

its direction is opposite to the frctional force

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