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NCERT-WORK AND ENERGY-Exercise
- An electric heater is rated 1500W. How much energy does it use in 10 ...
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- Illustrate the law of conservation of energy by discussing the energy ...
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- An object of mass m is moving with a constant velocity upsilon How muc...
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- calculate the work required to be done to stop a car of 1500 kg moving...
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- In each of the following, a force, F is acting on an object of mass, m...
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- Soni says that the acceleration in an object could be zero even when s...
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- find the energy in kWh consumed in 10 hours by four devices of power 5...
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- A freely falling object eventually stops on reaching the ground. What ...
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- A force of 7N acts on an object. The displacement is, say 8m, in the d...
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- When do we say that work is done ?
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- Write an expression for the work done when a force is acting on an obj...
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- Define 1 J of work.
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- A pair of bullocks exerts a force of 140 N on a plough. The field bei...
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- What is the kinetic energy of an object ?
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- Write an expression for kinetic energy of an object.
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- The kinetic energy of an object of mass m moving with a velocity of 5 ...
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- What is power ?
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- Define 1 W of power.
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- A lamp consumes 1000 J of electrical energy is 10 s. What is its power...
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- Define average power.
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