100 g of an iron ball having velocity 10$\ ms^{- 1}$ collides with wall at an angle 30${^\circ}$ and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 s, then the average force experienced by the wall is

Question

Dr. Abubacker · Accepted Answer

(a) Change in momentum
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$\mathrm{\Delta}p = 2\ mu\sin{30{^\circ}}$
$= 2 	imes 0.1 	imes 10 	imes \frac{1}{2}$
$= 1$ kg-$ms^{- 1}$
$F_{av} = \frac{\mathrm{\Delta}p}{\mathrm{\Delta}t} = \frac{1}{0.1} = 10$N

Q. 100 g of an iron ball having velocity 10$\ ms^{- 1}$ collides with wall at an angle 30${^\circ}$ and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 s, then the average force experienced by the wall is

Explanation

Reviewed by Dr. Abubacker

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