Question

a bullet of mass 7 g is fired into a block of metal weighing 7 kg . the block is free to move . calculate intial velocity of the bullet if the velocity of the block with the bullet in is o.7 m/s

Answer 1

By considering the conservation of momentum

m1*V1 = (m1+m2)*v

finding V1,after substuting the values

m1= 7g

m2=7000g

v=0.7 m/s

we get V1=700.7 m/s