In a football match a ball is kicked by a player with a force of 25N for 0.2 sec and then by another player with a force of 70 N for 0.1 sec in the same direction. If the foot ball gains a velocity of 24 m/s after the two kicks, the mass of the foot ball is nearly

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5kg

10 kg

2.5 kg

0.5 kg

answer is D.

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Detailed Solution

mv=F1t1+F2t2 m×24=25×0.2+70×0.1 =5+7 m×24=12 m=1224=12=0.5kg

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