268725 At what height above the ground must a mass of \(5 \mathrm{~kg}\) be to have its \(\mathrm{PE}\) equal in value to the KE possessed by it when it moves with a velocity of \(10 \mathrm{~m} / \mathrm{s}\) ? \(\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

268726 A body slides down a fixed curved track that is one quadrant of a circle of radius \(R\), as in the figure. If there is no friction and the body starts from rest, its speed at the bottom of the track is

268774 A freely falling body takes\(4 \mathrm{~s}\) to reach the ground. One second after release, the percentage of its potential energy, that is still retained is

268775 A vertically projected body attains the maximum height in6s. The ratio of kinetic energy at the end of \(3^{\text {rd }}\) second to decrease in kinetic energy in the next three seconds is

268776 Two identical blocks \(A\) and \(B\), each of mass ' \(m\) ' resting on smooth floor are connected by a light spring of natural length \(L\) and the spring constant \(k\), with the spring at its natural length. A third identical block \(C\) (mass \(m\) ) moving with a speed \(v\) along the line joining \(A\) and \(B\) collides with \(A\). The maximum compression in the spring is:

268725 At what height above the ground must a mass of \(5 \mathrm{~kg}\) be to have its \(\mathrm{PE}\) equal in value to the KE possessed by it when it moves with a velocity of \(10 \mathrm{~m} / \mathrm{s}\) ? \(\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

268726 A body slides down a fixed curved track that is one quadrant of a circle of radius \(R\), as in the figure. If there is no friction and the body starts from rest, its speed at the bottom of the track is

268774 A freely falling body takes\(4 \mathrm{~s}\) to reach the ground. One second after release, the percentage of its potential energy, that is still retained is

268775 A vertically projected body attains the maximum height in6s. The ratio of kinetic energy at the end of \(3^{\text {rd }}\) second to decrease in kinetic energy in the next three seconds is

268776 Two identical blocks \(A\) and \(B\), each of mass ' \(m\) ' resting on smooth floor are connected by a light spring of natural length \(L\) and the spring constant \(k\), with the spring at its natural length. A third identical block \(C\) (mass \(m\) ) moving with a speed \(v\) along the line joining \(A\) and \(B\) collides with \(A\). The maximum compression in the spring is:

268725 At what height above the ground must a mass of \(5 \mathrm{~kg}\) be to have its \(\mathrm{PE}\) equal in value to the KE possessed by it when it moves with a velocity of \(10 \mathrm{~m} / \mathrm{s}\) ? \(\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

268726 A body slides down a fixed curved track that is one quadrant of a circle of radius \(R\), as in the figure. If there is no friction and the body starts from rest, its speed at the bottom of the track is

268774 A freely falling body takes\(4 \mathrm{~s}\) to reach the ground. One second after release, the percentage of its potential energy, that is still retained is

268775 A vertically projected body attains the maximum height in6s. The ratio of kinetic energy at the end of \(3^{\text {rd }}\) second to decrease in kinetic energy in the next three seconds is

268776 Two identical blocks \(A\) and \(B\), each of mass ' \(m\) ' resting on smooth floor are connected by a light spring of natural length \(L\) and the spring constant \(k\), with the spring at its natural length. A third identical block \(C\) (mass \(m\) ) moving with a speed \(v\) along the line joining \(A\) and \(B\) collides with \(A\). The maximum compression in the spring is:

268725 At what height above the ground must a mass of \(5 \mathrm{~kg}\) be to have its \(\mathrm{PE}\) equal in value to the KE possessed by it when it moves with a velocity of \(10 \mathrm{~m} / \mathrm{s}\) ? \(\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

268726 A body slides down a fixed curved track that is one quadrant of a circle of radius \(R\), as in the figure. If there is no friction and the body starts from rest, its speed at the bottom of the track is

268774 A freely falling body takes\(4 \mathrm{~s}\) to reach the ground. One second after release, the percentage of its potential energy, that is still retained is

268775 A vertically projected body attains the maximum height in6s. The ratio of kinetic energy at the end of \(3^{\text {rd }}\) second to decrease in kinetic energy in the next three seconds is

268776 Two identical blocks \(A\) and \(B\), each of mass ' \(m\) ' resting on smooth floor are connected by a light spring of natural length \(L\) and the spring constant \(k\), with the spring at its natural length. A third identical block \(C\) (mass \(m\) ) moving with a speed \(v\) along the line joining \(A\) and \(B\) collides with \(A\). The maximum compression in the spring is:

268725 At what height above the ground must a mass of \(5 \mathrm{~kg}\) be to have its \(\mathrm{PE}\) equal in value to the KE possessed by it when it moves with a velocity of \(10 \mathrm{~m} / \mathrm{s}\) ? \(\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

268726 A body slides down a fixed curved track that is one quadrant of a circle of radius \(R\), as in the figure. If there is no friction and the body starts from rest, its speed at the bottom of the track is

268774 A freely falling body takes\(4 \mathrm{~s}\) to reach the ground. One second after release, the percentage of its potential energy, that is still retained is

268775 A vertically projected body attains the maximum height in6s. The ratio of kinetic energy at the end of \(3^{\text {rd }}\) second to decrease in kinetic energy in the next three seconds is

268776 Two identical blocks \(A\) and \(B\), each of mass ' \(m\) ' resting on smooth floor are connected by a light spring of natural length \(L\) and the spring constant \(k\), with the spring at its natural length. A third identical block \(C\) (mass \(m\) ) moving with a speed \(v\) along the line joining \(A\) and \(B\) collides with \(A\). The maximum compression in the spring is: