Embibe Experts Solutions for Chapter: Centre of Mass, Momentum and Collisions, Exercise 1: Exercise-1

A particle of mass $m$ moving towards waste with a velocity $v$ collides with another particle of the same mass moving towards the north with the same speed and adheres to it. The velocity of the combined particle is, 

An iron ball of mass $100 \mathrm{g}$ moving at a speed of $10 \mathrm{m} {\mathrm{s}}^{-1}$ strikes a wall at angle of $30°$ and reflects at the same angle. If ball and wall remain in contact for $0.1 \mathrm{s},$ the force exerted on the wall will be, 

When two bodies collide elastically, then:

In an elastic collision in absence of external force, which of the following is/are correct.

A block $A$ of mass $m$ moving with the velocity $\text{'}v\text{'}$ along a frictionless horizontal track and a block $B$ of mass $\frac{m}{2}$ moving with velocity $2 v$ collides elastically. The final speed of the block $A$ is:

A particle of mass $m$ moves with velocity $v_0=20 \mathrm{m} {\sec }^{-1}$ towards a wall that is moving with velocity $v=5 \mathrm{m} {\sec }^{-1}.$ If the particle collides with the wall elastically, the speed of the particle just after the collision is:

Two particles $A$ and $B$ of masses $10 \mathrm{kg}$ and $38 \mathrm{kg}$, respectively are moving along the same straight line with velocities $15 {\mathrm{ms}}^{-1} \text{\& }3 {\mathrm{ms}}^{-1}$, respectively in the same direction. After elastic collision the velocities of $A$ and $B$ are $V_A$ and $V_B$ in the direction of initial motion. Then 

In a perfectly inelastic direct collision maximum transfer of energy takes place if,