81. The water flowing in a hydroelectric power station can run the turbine because it containes.
82. When displacement occurs, the work done by the force is considered to be negative.
83. A boy of 50 kg mass climbs 43 stairs in 10 seconds. If the height of each stair is 15cm then find its power?
84. A body has a free fall from a height of 20m. After falling through a distance of 5 m, the body would
85. Which of the following is not a characteristic of work?
86. Which of the following work done does not depend-
87. What is the definition of mass?
88. The kinetic energy of which particle is maximum-
89. Which of the following is not a perfectly inelastic collision?
90. A snowboard pulled up by a two rope travels at the rate of 5 m/sec up a mountain. If 3000 watt of power is used, what force was applied to it?
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