An object is pushed along a rough horizontal surface and released. It slides for 10s before coming to rest and travels 20cm during the last 1s of its slide. Assuming acceleration is uniform throughouta) How fast was the object travelling upon release?b)How fast was the object travelling when it reached the halfway position of its slide?

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Asked Apr 2, 2019
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An object is pushed along a rough horizontal surface and released. It slides for 10s before coming to rest and travels 20cm during the last 1s of its slide. Assuming acceleration is uniform throughout

a) How fast was the object travelling upon release?

b)How fast was the object travelling when it reached the halfway position of its slide?

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Expert Answer

Step 1

(a) Equations of motions are used to find the speed of the object. Considering the last sec, the uniform acceleration can be find out.

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Step 2

Since the acceleration is uniform, it will be same throughout the process, so we can substitute the value for the entire case. The speed upon release is given by equation (1).

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Step 3

(b)

To find the speed of the object when it reached the half way position in its slide, the distance traveled to reach ...

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