Conservation of Momentum

A boy of mass $50 \mathrm{k}\mathrm{g}$ jumps out of a rowing boat of $300 \mathrm{k}\mathrm{g}$ on to the bank with a horizontal velocity of $3 \mathrm{m} {\mathrm{s}}^{-1}$. With what velocity does the boat begin to move backwards?

A gun of mass $\mathrm{M} \mathrm{kg}$ fires a shell of mass $1.5 \mathrm{kg}$ with a velocity of $150 \mathrm{m} {\mathrm{s}}^{-1}$ and recoils with a velocity of $1.5 \mathrm{m} {\mathrm{s}}^{-1}$. Calculate the mass of the gun.

A gun of mass $1000 \mathrm{kg}$ fires a shell of mass $2 \mathrm{kg}$ with a velocity of $200 \mathrm{m}/\mathrm{s}$. Calculate the velocity of recoil of the gun.

A body of mass $50 \mathrm{kg}$ has a momentum of $250 {\mathrm{kgms}}^{-1}$, its velocity is _____${\mathrm{ms}}^{-1}$.

A toy car of mass $250 \mathrm{g}$ is moving with a velocity of $5 {\mathrm{ms}}^{-1}$, its momentum is _____ ${\mathrm{kgms}}^{-1}$.

What is the momentum of an object of mass m, moving with a velocity v?

Rocket works on the principle of conservation of

A goalkeeper in the game of football pulls his hands backward after holding the ball shot at the goal. This enables the goalkeeper to

The momentum of an object is given by the formula : $momentum=mass\times x$. Here $x$ is _____.

A metal ball rebounds better than rubber ball. True or false?

A force can do no work on a body, yet the body can move under accelerated motion. True or false?

One of the sources of renewable energy is _____. 

The source of geothermal energy is _____ .

A nonrenewable energy is _____.

"If no external torque is applied on a body, total angular momentum is conserved" stated law is called _____.

Law of conservation of angular momentum is mostly used in _____.

Product of force and time is known as _____.

The product of mass of a body and velocity is equal to its _____.

A car of mass $1000 \mathrm{kg}$ is moving with a velocity of $72 {\mathrm{kmh}}^{-1}$. Find its momentum?

SI Unit of momentum is