71. A raised hammer possesses
72. What is the potential energy of an object of mass 40 kg when it is lifted at a height of 5m above the ground?
73. Mechanical energy - kinetic energy = ?
74. What is called pushing or pulling an object to move it?
75. An object capable of performing a work has . . . . . . . .
76. The energy received by an object by its position and configuration is called?
77. The energy of a body is
78. In which of the following energy is kinetic energy?
1. A bullet fired by a gun
2. A fast moving railway engine
3. Speed of a simple pendulum
1. A bullet fired by a gun
2. A fast moving railway engine
3. Speed of a simple pendulum
79. A boy of 50 kg mass climbs 45 stairs in 10 seconds. If the height of each stair is 16cm then find his power?
80. Which of the following physical quantity measure the rate of work?
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