A man is standing on a balance and his weight is measured. If he takes a step in the left side, then weight
Will decrease
Will increase
Remains same
First decreases then increases
A ball is moving towards the wall as shown in diagram then its momentum is conserved
An open water tight railway wagon of mass $5 \times 10^3 kg$ coasts at an initial velocity $1.2 m/s$ without friction on a railway track. Rain drops fall vertically downwards into the wagon. The velocity of the wagon after it has collected $10^3 kg$ of water will be .............. $\mathrm{m}/ \mathrm{s}$
Rocket engines lift a rocket from the earth surface because hot gas with high velocity
The motion of a rocket is based on the principle of conservation of
Two bodies of mass $4 \mathrm{~g}$ and $25 \mathrm{~g}$ are moving with equal kinetic energies. The ratio of magnitude of their linear momentum is :