Which one of the following statements does not hold good when two balls of masses $m _1$ and $m _2$ undergo elastic collision
When $m_1 < m_2$ and $m_2$ at rest, there will be maximum transfer of momentum.
When $m _1 > m _2$ and $m _2$ at rest, after collision the ball of mass $m_2$ moves with four times the velocity of $m_1$.
When $m_1=m_2$ and $m_2$ at rest, there will be maximum transfer of $K. E$
When collision is oblique and $m _2$ at rest with $m_1=m_2$ after collision the ball moves in opposite directions.
A point mass $M$ moving with a certain velocity collides with a stationary point mass $M / 2$. The collision is elastic and in one-dimension. Let the ratio of the final velocities of $M$ and $M / 2$ be $x$. The value of $x$ is
A mass of $10 \,gm$ moving with a velocity of $100\, cm/s$ strikes a pendulum bob of mass $10\, gm$. The two masses stick together. The maximum height reached by the system now is ............... $cm$ $(g = 10\,m/{s^2})$
A ball hits the floor and rebounds after inelastic collision. In this case
Which of the following statement is true?
An inelastic ball is dropped from a height of $100\, m$. Due to earth$20\%$ of its energy is lost. To what height the ball will rise ......... $m$