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Acceleration

A bullet of m...

Question

A bullet of mass 7 gm is fired into a block of metal weighing 7 kg. The block is free to move. Calculate the initial velocity of the bullet if the velocity of the block with the bullet in it is 0.7m/sec

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Solution

By considering the conservation of momentum

m1V1 = (m1+m2)v

finding V1,after substuting the values

m1= 7g

m2=7000g

v=0.7 m/s

7V1 = (7000+7)0.7
V1 = 7007*0.7/7

we get V1=700.7 m/s

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