Part 1

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 [...]

The potential energy of a certain spring when stretched through a distance ‘S’ is 10 joule. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance ‘S’ will be Work done from d = 0 m to d = 3 m October 21, 2020 Category: [...]

When a spring is stretched by 2 cm, it stores 100 J of energy. If it is further stretched by 2 cm, the stored energy will be increased by it stores 100 J of energy. If it is further stretched by 2 cm the stored energy will be increased by When a spring is stretched [...]

If the kinetic energy of body is directly proportional to time t, the magnitude of force acting on the body is (i) directly proportional to t√ (ii) inversely proportional to t√ (iii) directly proportional to the speed of the body. (iv) inversely proportional to the speed of the body. If the kinetic energy of body [...]

The kinetic energy acquired by a body of mass m in travelling a certain distance starting from rest, under a constant force is: The kinetic energy acquired by a body of mass m in travelling a certain distance starting from rest under a constant force is: October 21, 2020 Category: Cengage NEET by C.P Singh [...]

If the force acting on a body is inversely proportional to its speed, the kinetic energy of the body is If the force acting on a body is inversely proportional to its speed the kinetic energy of the body is October 21, 2020 Category: Cengage NEET by C.P Singh , Chapter 8 - Work, Energy [...]