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JUUN21.A bullet is fired into wood. The bullet penetrates for 7s to come to rest. Find thedistance travelled by the bullet in the wood if the retardation offered by thewood is 0.4m/s2a) 2.8mb) 6.8mc) 5.6md) 9.8m |
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Answer» v=u-atu=v+at =0+0.4*7 =2.8m/ss=ut-1/2at^2 2.8*7-1/2*0.4*7^2 19.6-0.2*49 19.6-9.8 9.8m |
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