149164 A ball of mass $0.15 \mathrm{~kg}$ hits the wall with its initial speed of $12 \mathrm{~ms}^{-1}$ and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is $100 \mathrm{~N}$. calculate the time duration of the contact of ball with the wall.

149165 Two objects I and II of mass $0.8 \mathrm{~kg}$ and $0.6 \mathrm{~kg}$ collide elastically. If before collision, the object II was at rest and object I was moving. Find the ratio of the final velocity of object $I$ and object II.

149166 Two identical bodies of same mass move with speed $V_{0}$ an $2 V_{0}$, respectively in directions perpendicular to each other. After some time, the bodies collide and merge with each other. The speed after collision is

149167 A body of mass ' $M$ ' collides against a wall with a speed ' $v$ ' and retraces its path with the same speed, the change in momentum is

149164 A ball of mass $0.15 \mathrm{~kg}$ hits the wall with its initial speed of $12 \mathrm{~ms}^{-1}$ and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is $100 \mathrm{~N}$. calculate the time duration of the contact of ball with the wall.

149165 Two objects I and II of mass $0.8 \mathrm{~kg}$ and $0.6 \mathrm{~kg}$ collide elastically. If before collision, the object II was at rest and object I was moving. Find the ratio of the final velocity of object $I$ and object II.

149166 Two identical bodies of same mass move with speed $V_{0}$ an $2 V_{0}$, respectively in directions perpendicular to each other. After some time, the bodies collide and merge with each other. The speed after collision is

149167 A body of mass ' $M$ ' collides against a wall with a speed ' $v$ ' and retraces its path with the same speed, the change in momentum is

149164 A ball of mass $0.15 \mathrm{~kg}$ hits the wall with its initial speed of $12 \mathrm{~ms}^{-1}$ and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is $100 \mathrm{~N}$. calculate the time duration of the contact of ball with the wall.

149165 Two objects I and II of mass $0.8 \mathrm{~kg}$ and $0.6 \mathrm{~kg}$ collide elastically. If before collision, the object II was at rest and object I was moving. Find the ratio of the final velocity of object $I$ and object II.

149166 Two identical bodies of same mass move with speed $V_{0}$ an $2 V_{0}$, respectively in directions perpendicular to each other. After some time, the bodies collide and merge with each other. The speed after collision is

149167 A body of mass ' $M$ ' collides against a wall with a speed ' $v$ ' and retraces its path with the same speed, the change in momentum is

149164 A ball of mass $0.15 \mathrm{~kg}$ hits the wall with its initial speed of $12 \mathrm{~ms}^{-1}$ and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is $100 \mathrm{~N}$. calculate the time duration of the contact of ball with the wall.

149165 Two objects I and II of mass $0.8 \mathrm{~kg}$ and $0.6 \mathrm{~kg}$ collide elastically. If before collision, the object II was at rest and object I was moving. Find the ratio of the final velocity of object $I$ and object II.

149166 Two identical bodies of same mass move with speed $V_{0}$ an $2 V_{0}$, respectively in directions perpendicular to each other. After some time, the bodies collide and merge with each other. The speed after collision is

149167 A body of mass ' $M$ ' collides against a wall with a speed ' $v$ ' and retraces its path with the same speed, the change in momentum is