Work and Energy Class 9 The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why? Bolu March 19, 2026 No Comments
Work and Energy Class 9 A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer. Bolu March 19, 2026 No Comments
Work and Energy Class 9 Certain force acting on a 20 kg mass changes its velocity from 5 m s–1 to 2 m s–1. Calculate the work done by the force. Bolu March 19, 2026 No Comments
Work and Energy Class 9 A battery lights a bulb. Describe the energy changes involved in the process. Bolu March 19, 2026 No Comments
Work and Energy Class 9 An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object? Bolu March 19, 2026 No Comments
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