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Category: Class 9

QUESTION : How did George and Harris react to this? Did Jerome like their reaction?

Class 9 English
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QUESTION : Why did the narrator (Jerome) volunteer to do the packing?

Class 9 English
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QUESTION : How many characters are there in the narrative? Name them.

Class 9 English
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Write the summary of ‘packing’.

Class 9 English
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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 zero.

Class 9 Physics Work and Energy
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Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?

Class 9 Physics Work and Energy
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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?

Class 9 Physics Work and Energy
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An electric heater is rated 1500 W. How much energy does it use in 10 hours?

Class 9 Physics Work and Energy
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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 violation of the law of conservation of energy?

Class 9 Physics Work and Energy
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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.?

Class 9 Physics
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What is the work done by the force of gravity on a satellite moving around the earth? Justify your answer.

Class 9 Physics
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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 halfway down.

Class 9 Physics
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