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PSEB-WORK AND ENERGY-EXERCISE
- Look at the activities listed below. Reason out whether or not work is...
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- An object throw at a certain angle to the ground moves in a curved ...
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- A battery lights a bulb. Describe the energy changes involved in the p...
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- Certain force acting on a 20 kg mass changes its velocity from 5ms ^-...
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- A mass of 10 kg is at a point A on a table. It is moved to a point B. ...
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- The potential energy of a freely falling object decreases progressivel...
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- What are the various energy transformations that occur when you are ri...
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- Does the transfer of energy takes place when you push a huge rock with...
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- A certain household has consumed 250 units of electric energy during a...
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- An object of mass 40 kg is raised to a height of 5 m above the ground....
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- What is the work done by the force of gravity on a satellite moving ro...
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- Can there be a displacement of any object in the absence of any extern...
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- A person holds a bundle of hay over his head for 30 minutes and gets t...
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- An electric heater is rated 1500W. How much energy does it use in 10 h...
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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,v. How much wo...
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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. T...
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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 kW h consumed in 10 hours by four devices of power ...
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