Question

A bullet of mass a is fired with a celocity b in block of wood of mass c the velocity of mass will be

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Hardeep Singh asked in Science

a bullet of mass a and velocity B is fired into a block of wood of mass C . if the loss of any mass and friction

be neglected, the velocity of the sustem must be?

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Somnath Mazumder answered this
8403 helpful votes in Science, Class XII-Science

Here,

Mass of bullet = a

Mass of wood = c

Velocity of bullet = b.

Initial momentum of the bullet = ab

Initial momentum of the wood = c×0 = 0 (because the wood was at rest)

Final mass of the system = a + c (because bullet goes inside the wood)

Let the velocity of the system = v

We know that

Initial momentum = final momentum

Initial Momentum of bullet + initial momentum of the wood = final momentum of the system

ab + 0 = (a + c)v

=> v = ab/(a + c)