Work and Energy Class 9What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer. By Quick Guide Team / March 19, 2026
Work and Energy Class 9A certain Household has consumed 250 units of energy during a month. How much energy is this in Joules? By Quick Guide Team / March 19, 2026
Work and Energy Class 9Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going? By Quick Guide Team / March 19, 2026
Work and Energy Class 9What are the various energy transformations that occur when you are riding a bicycle? By Quick Guide Team / March 19, 2026
Work and Energy Class 9The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why? By Quick Guide Team / March 19, 2026
Work and Energy Class 9A 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. By Quick Guide Team / March 19, 2026
Work and Energy Class 9Certain 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. By Quick Guide Team / March 19, 2026
Work and Energy Class 9A battery lights a bulb. Describe the energy changes involved in the process. By Quick Guide Team / March 19, 2026
Work and Energy Class 9An 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? By Quick Guide Team / March 19, 2026
Class 9, PhysicsA stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s–2 and speed of sound = 340 m s–1 By Quick Guide Team / March 5, 2026
