A bullet of mass $$m$$ hits a block of mass $$M$$ elastically. The transfer of energy is the maximum, when :

Two particles A and B initially at rest, move towards each other under mutual force of attraction. At an instance when the speed of A is v and speed of B is 3v, the speed of centre of mass is :

A $$1 \mathrm{~kg}$$ object strikes a wall with velocity $$1 \mathrm{~m} \mathrm{~s}^{-1}$$ at an angle of $$60^{\circ}$$ with the wall and reflects at the same angle. If it remains in contact with wall for $$0.1 \mathrm{~s}$$, then the force exerted on the wall is :

The distance covered by a body of mass 5 g having linear momentum 0.3 kg m/s in 5 s is :