268766 A rubber ball falling from a height of\(5 \mathrm{~m}\) rebounds from a hard floor to a height of \(3.5 \mathrm{~m}\). The \(\%\) loss of energy during the impact is

268767 When a long spring is stretched by \(x \mathrm{~cm}\), its P.E is \(U\). If the spring is stretched by \(N_{X} \mathrm{~cm}\), the P.E stored in it will be

268768 An elastic spring is compressed between two blocks of masses\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) resting on a smooth horizontal table as shown. If the spring has \(12 \mathrm{~J}\) of energy and suddenly released, the velocity with which the larger block of \(2 \mathrm{~kg}\) moves will be

268769 A block of mass\(2 \mathbf{k g}\) is on a smooth horizontal surface. A light spring of force constant \(800 \mathrm{~N} /\) m has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance of \(5 \mathrm{~cm}\) and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

268836 A simple pendulum is swinging in vertical plane. The ratio of its potential energy when it is making\(45^{\circ}\) and \(90^{\circ}\) with the vertical is

268766 A rubber ball falling from a height of\(5 \mathrm{~m}\) rebounds from a hard floor to a height of \(3.5 \mathrm{~m}\). The \(\%\) loss of energy during the impact is

268767 When a long spring is stretched by \(x \mathrm{~cm}\), its P.E is \(U\). If the spring is stretched by \(N_{X} \mathrm{~cm}\), the P.E stored in it will be

268768 An elastic spring is compressed between two blocks of masses\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) resting on a smooth horizontal table as shown. If the spring has \(12 \mathrm{~J}\) of energy and suddenly released, the velocity with which the larger block of \(2 \mathrm{~kg}\) moves will be

268769 A block of mass\(2 \mathbf{k g}\) is on a smooth horizontal surface. A light spring of force constant \(800 \mathrm{~N} /\) m has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance of \(5 \mathrm{~cm}\) and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

268836 A simple pendulum is swinging in vertical plane. The ratio of its potential energy when it is making\(45^{\circ}\) and \(90^{\circ}\) with the vertical is

268766 A rubber ball falling from a height of\(5 \mathrm{~m}\) rebounds from a hard floor to a height of \(3.5 \mathrm{~m}\). The \(\%\) loss of energy during the impact is

268767 When a long spring is stretched by \(x \mathrm{~cm}\), its P.E is \(U\). If the spring is stretched by \(N_{X} \mathrm{~cm}\), the P.E stored in it will be

268768 An elastic spring is compressed between two blocks of masses\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) resting on a smooth horizontal table as shown. If the spring has \(12 \mathrm{~J}\) of energy and suddenly released, the velocity with which the larger block of \(2 \mathrm{~kg}\) moves will be

268769 A block of mass\(2 \mathbf{k g}\) is on a smooth horizontal surface. A light spring of force constant \(800 \mathrm{~N} /\) m has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance of \(5 \mathrm{~cm}\) and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

268836 A simple pendulum is swinging in vertical plane. The ratio of its potential energy when it is making\(45^{\circ}\) and \(90^{\circ}\) with the vertical is

268766 A rubber ball falling from a height of\(5 \mathrm{~m}\) rebounds from a hard floor to a height of \(3.5 \mathrm{~m}\). The \(\%\) loss of energy during the impact is

268767 When a long spring is stretched by \(x \mathrm{~cm}\), its P.E is \(U\). If the spring is stretched by \(N_{X} \mathrm{~cm}\), the P.E stored in it will be

268768 An elastic spring is compressed between two blocks of masses\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) resting on a smooth horizontal table as shown. If the spring has \(12 \mathrm{~J}\) of energy and suddenly released, the velocity with which the larger block of \(2 \mathrm{~kg}\) moves will be

268769 A block of mass\(2 \mathbf{k g}\) is on a smooth horizontal surface. A light spring of force constant \(800 \mathrm{~N} /\) m has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance of \(5 \mathrm{~cm}\) and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

268836 A simple pendulum is swinging in vertical plane. The ratio of its potential energy when it is making\(45^{\circ}\) and \(90^{\circ}\) with the vertical is

268766 A rubber ball falling from a height of\(5 \mathrm{~m}\) rebounds from a hard floor to a height of \(3.5 \mathrm{~m}\). The \(\%\) loss of energy during the impact is

268767 When a long spring is stretched by \(x \mathrm{~cm}\), its P.E is \(U\). If the spring is stretched by \(N_{X} \mathrm{~cm}\), the P.E stored in it will be

268768 An elastic spring is compressed between two blocks of masses\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) resting on a smooth horizontal table as shown. If the spring has \(12 \mathrm{~J}\) of energy and suddenly released, the velocity with which the larger block of \(2 \mathrm{~kg}\) moves will be

268769 A block of mass\(2 \mathbf{k g}\) is on a smooth horizontal surface. A light spring of force constant \(800 \mathrm{~N} /\) m has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance of \(5 \mathrm{~cm}\) and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

268836 A simple pendulum is swinging in vertical plane. The ratio of its potential energy when it is making\(45^{\circ}\) and \(90^{\circ}\) with the vertical is