Question

An object of 1kg mass falls from a height of 5 meters and stops in the sand by going 0.5 meters. Find the value of the force exerted by the sand.

Answer 1

Answer:

Potential energy of ball will convert to KE

SO, mgh=2mv2⇒v=2gh=2×9.8×10=14 m/s

When object will pass through sand it will loose its KE to overcome the resisting force by sand.

Now Fs=2mv2=98⇒F=0.0298=4900N 

Explanation:

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