3) A rock is thrown straight up from the earth\'s surface. Which oneof the follo

Question

3)

A rock is thrown straight up from the earth's surface. Which oneof the following statements concerning the net force acting on therock at the top of its path is correct?

A )

The net force is less than the weight of the rock, but greaterthan zero newtons.

B )

The net force is equal to the weight of the rock.

C )

The net force is greater than the weight of the rock.

D )

The direction of the net force changes from up to down.

E )

The net force is instantaneously equal to zero newtons.

3)

A rock is thrown straight up from the earth's surface. Which oneof the following statements concerning the net force acting on therock at the top of its path is correct?

Explanation / Answer

Given :
. A rock is thrown straight up from the earth's surface. Whichone of the following statements concerning the net force acting onthe rock at the top of its path is .            F = mg . Here   g - value is positive as the object isfalling from certain height .            g- value is negative as the object is thrown vertically up . Hence   .            The net force is equal to the weight of the rock. .           The direction of the net force changes from up to down. . Hope this helps u!

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