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What happens to its kinetic energy? 5 years ago Trisha Dave class 9 cbse ncert work power energy Find the energy in kW h consumed in 10 hours by four devices of power 500 W each. 5 years ago Trisha Dave class 9 cbse ncert work power energy Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why? 5 years ago Trisha Dave class 9 cbse ncert work power energy In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or ... 5 years ago Trisha Dave class 9 cbse ncert work power energy Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km h^-1? 5 years ago Trisha Dave class 9 cbse ncert work power energy An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest? 5 years ago Trisha Dave class 9 cbse ncert work power energy Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a pendulum bob to one side and allow it to oscillate. Why does the bob eventually come to rest? What happens to its energy eventually? Is it a viol... 5 years ago Trisha Dave class 9 cbse ncert work power energy An electric heater is rated 1500 W. How much energy does it use in 10 hours? 5 years ago Trisha Dave class 9 cbse ncert work power energy A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer. 5 years ago Trisha Dave class 9 cbse ncert work power energy Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher. 5 years ago Trisha Dave class 9 cbse ncert work power energy What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer. 5 years ago Trisha Dave class 9 cbse ncert work power energy An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down. 5 years ago Trisha Dave class 9 cbse ncert work power energy A certain household has consumed 250 units of energy during a month. How much energy is this in joules? 5 years ago Trisha Dave class 9 cbse ncert work power energy Does 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? 5 years ago Trisha Dave class 9 cbse ncert work power energy What are the various energy transformations that occur when you are riding a bicycle? 5 years ago Trisha Dave class 9 cbse ncert work power energy The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why? 5 years ago Trisha Dave class 9 cbse ncert work power energy 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. 5 years ago Trisha Dave class 9 cbse ncert work power energy Certain force acting on a 20 kg mass changes its velocity from 5 ms^-1 to 2 ms^-1. Calculate the work done by the force. 5 years ago Trisha Dave class 9 cbse ncert work power energy A battery lights a bulb. Describe the energy changes involved in the process. 5 years ago Trisha Dave class 9 cbse ncert work power energy 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 ob... 5 years ago Trisha Dave class 9 cbse ncert work power energy Page 1 / 2 1 2 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
