91. An example of pulling is-
92. If a person pulls the trolley up to the distance of 10 m with the force of 50 N, what will be the work done by him?
93. In which of the following situations is the work done by negative force?
94. An object has a potential energy of 400J with a mass of 20kg and a gravity of 10 m/s2, what is the height of that object?
95. Potential energy is equal to-
96. Energy conservation means
97. An object of mass 50 kg is moving at a fixed velocity of 6 ms-1. Calculate the momentum of the object.
98. If a stationary force applied to an object, the object moved in the direction of force, is expressed as a result of force and displacement, it is called_
99. Which of the following can not be created nor be destroyed?
100. What is the mass of a unit volume of substance called?
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