Chapter 8 – Work, Energy and Power

A simple pendulum of length 1m has bob of mass 100 g. It is displaced through an angle of 60^∘ from the vertical and then released. The kinetic energy of bob when it passes through the mean position is Work done from d = 0 m to d = 3 m October 21, 2020 Category: [...]

The figure shown a particle sliding on a frictionless track, which terminates in a straight horizontal section. If the particle starts slipping from the point A, how far away from the track will the particle hit the ground? how far away from the track will the particle hit the ground? The figure shown a particle [...]

A projectile is fired from the top of an 80 m high cliff with an initial speed of 30(m)/(s) at an unknown angle. The speed when its hits the ground. A projectile is fired from the top of an 80 m high cliff with an initial speed of 30(m)/(s) at an unknown angle. The speed [...]

The block is given an initial velocity v0 on smooth curved surface, Its speed when it reaches to B will be Its speed when it reaches to B will be The block is given an initial velocity v0 on smooth curved surface October 21, 2020 Category: Cengage NEET by C.P Singh , Chapter 8 - [...]

A heavy stone is thrown from a cliff of height h with a speed v. The stone will hit the ground with maximum speed if it is thrown A heavy stone is thrown from a cliff of height h with a speed v. The stone will hit the ground with maximum speed if it is [...]

A ball is projected vertically upwards with a certain initial speed. Another ball of the same mass is projected at an angle of 60^∘ with the vertical with the same initial speed. At highest points of their journey, the ratio of their potential energies will be Work done from d = 0 m to d [...]

A stone projected vertically upwards from the ground reaches a maximum height h. When it is at a height (3h)/(4), the ratio of its kinetic and potential energies is A stone projected vertically upwards from the ground reaches a maximum height h. When it is at a height (3h)/(4) the ratio of its kinetic and [...]

Two equal masses are attached to the two ends of a spring of spring constant k. The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring on each mass is Work done from d = 0 m to d = 3 [...]

Two springs X and Y (kX = 2kY) are stretched by applying forces of equal magnitudes at the four ends. If the energy stored in X is U, that in Y is : that in Y is : Two springs X and Y (kX = 2kY) are stretched by applying forces of equal magnitudes at [...]

An elastic spring of natural length l and force constant k is stretched by a length a .It is further stretched by a length β. The work done in second stretching is An elastic spring of natural length l and force constant k is stretched by a length a .It is further stretched by a [...]