PART - 1 CH - 3 Motion in a Plane — Physics STD 11 Science — Question

Two blocks of masses 10kg and 20kg moving at speeds of 10ms^-1 and 20ms^-1 respectively in opposite directions, approach each other and collide. If the collision is completely inelastic, find the thermal energy developed in the process.

How does the viscous force between two layers of a liquid depend upon the relative velocity between two layers?

Is reversible process possible in nature?

Which of the following conditions is not sufficient for S.H.M. and why?

1. Acceleration displacement.
2. Restoring force o displacement.

NaCl molecule is bound due to the electric force between the sodium and the chlorine ions when one electron. of sodium is transferred to chlorine. Taking the separation between the ions to be 2.75 × 10cm, find the force of attraction between them· State the assumptions (if any) that you have made.

The velocity of an airplane is tripled. what will be the momentum? Will momentum be conserved?

A wave pulse passing on a string with a speed of 40cm/s in the negative x-direction has its maximum at x = 0 at t = 0. Where will this maximum be located at t = 5s?

Give an example of:
A constant which has no unit.

Calculate the volume of 1 mole of an ideal gas at STP.

One often comes across the following kind of statement concerning circular motion. A particle moving uniformly along a circle experiences a force directed towards the centre and an equal and opposite force directed away from the centre. The two forces together keep the particle in equilibrium. Explain, what is wrong with this statement?