355256 A ball of mass \(200\;g\) rests on a vertical post of height \(20\;m\). A bullet of mass \(10\;g\), travelling in horizontal direction, hits the centre of the ball. After collision both travels independently. The ball hits the ground at a distance \(30\;m\) and the bullet at a distance of \(120\;m\) from the foot of the post. The value of initial velocity of the bullet will be (if \({g = 10\;m{\rm{/}}{s^2}}\))

355257 A sphere of mass 8 \(m\) collides elastically (in one dimension) with a block of mass 2 \(m\). If the initial energy of sphere is \(E\). What is the final energy of sphere?

355258 Two balls of same mass each \(m\) are moving with same velocities, \(v\) on a smooth surface as shown in figure. If all collisions between the masses and with the wall are perfectly elastic, the possible number of collisions between the bodies and wall together is

355259 Assertion :
The conservation of kinetic energy in elastic collision applies after the collision is over and does not hold at every instant of the collision.
Reason :
During a collision the total linera momentum is not conserved at every instant of collision.

355256 A ball of mass \(200\;g\) rests on a vertical post of height \(20\;m\). A bullet of mass \(10\;g\), travelling in horizontal direction, hits the centre of the ball. After collision both travels independently. The ball hits the ground at a distance \(30\;m\) and the bullet at a distance of \(120\;m\) from the foot of the post. The value of initial velocity of the bullet will be (if \({g = 10\;m{\rm{/}}{s^2}}\))

355257 A sphere of mass 8 \(m\) collides elastically (in one dimension) with a block of mass 2 \(m\). If the initial energy of sphere is \(E\). What is the final energy of sphere?

355258 Two balls of same mass each \(m\) are moving with same velocities, \(v\) on a smooth surface as shown in figure. If all collisions between the masses and with the wall are perfectly elastic, the possible number of collisions between the bodies and wall together is

355259 Assertion :
The conservation of kinetic energy in elastic collision applies after the collision is over and does not hold at every instant of the collision.
Reason :
During a collision the total linera momentum is not conserved at every instant of collision.

355256 A ball of mass \(200\;g\) rests on a vertical post of height \(20\;m\). A bullet of mass \(10\;g\), travelling in horizontal direction, hits the centre of the ball. After collision both travels independently. The ball hits the ground at a distance \(30\;m\) and the bullet at a distance of \(120\;m\) from the foot of the post. The value of initial velocity of the bullet will be (if \({g = 10\;m{\rm{/}}{s^2}}\))

355257 A sphere of mass 8 \(m\) collides elastically (in one dimension) with a block of mass 2 \(m\). If the initial energy of sphere is \(E\). What is the final energy of sphere?

355258 Two balls of same mass each \(m\) are moving with same velocities, \(v\) on a smooth surface as shown in figure. If all collisions between the masses and with the wall are perfectly elastic, the possible number of collisions between the bodies and wall together is

355259 Assertion :
The conservation of kinetic energy in elastic collision applies after the collision is over and does not hold at every instant of the collision.
Reason :
During a collision the total linera momentum is not conserved at every instant of collision.

355256 A ball of mass \(200\;g\) rests on a vertical post of height \(20\;m\). A bullet of mass \(10\;g\), travelling in horizontal direction, hits the centre of the ball. After collision both travels independently. The ball hits the ground at a distance \(30\;m\) and the bullet at a distance of \(120\;m\) from the foot of the post. The value of initial velocity of the bullet will be (if \({g = 10\;m{\rm{/}}{s^2}}\))

355257 A sphere of mass 8 \(m\) collides elastically (in one dimension) with a block of mass 2 \(m\). If the initial energy of sphere is \(E\). What is the final energy of sphere?

355258 Two balls of same mass each \(m\) are moving with same velocities, \(v\) on a smooth surface as shown in figure. If all collisions between the masses and with the wall are perfectly elastic, the possible number of collisions between the bodies and wall together is

355259 Assertion :
The conservation of kinetic energy in elastic collision applies after the collision is over and does not hold at every instant of the collision.
Reason :
During a collision the total linera momentum is not conserved at every instant of collision.