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Day: February 14, 2022

According to the third law of motion when we push on an object, the object pushes back on us with an equal and opposite force. If the object is a massive truck parked along the roadside, it will probably not move. A student justifies this by answering that the two opposite and equal forces cancel each other. Comment on this logic and explain why the truck does not move.

Class 9 Physics
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Two objects, each of mass 1.5 kg, are moving in the same straight line but in opposite directions. The velocity of each object is 2.5 m s-1 before the collision during which they stick together. What will be the velocity of the combined object after collision?

Class 9 Physics
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Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

Class 9 Physics
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What is the momentum of an object of mass m, moving with a velocity v? (a) (mv) 2 (b) mv2 (c) ½ mv2 (d) mv

Class 9 Physics
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An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 m s–2?

Class 9 Physics
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Teenagers often feel confused. They face a lot of pressure from various quarters. Write an article in 120-150 words, on ‘Stress the teenager’s face’. You are Rani/Rama.

English Class 12 Class 11
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India is a land of diversity. One way in which it makes us feel proud of it is the number of festivals we enjoy. Write an article in 150-200 words on ‘Festivals of India’. You are Karuna/ Karan.

Class 12 Class 11 English
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TV and the Internet have reduced the charm of reading for children. Write an article in 120-150 words on the reasons for this lack of interest. Suggest measures to create a desire to read among children right from a very young age. You are Ram/Rama.

Class 12 Class 11 English
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Rising pollution, fast and competitive lifestyle, lack of nutritious food etc. have caused health woes for a large section of our population. Providing health care used to be a charitable and ethical activity. Today it has become a commercialized, money spinning business. Write an article in 150-200 words on ‘How to provide proper health care to the common man’. You are Karan/Karuna.

English Class 12 Class 11
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India is an emerging economy. We are rich in natural resources. Yet a significant proportion of our people are living below the poverty line. One cause of this poverty is our rising population. Write an article in 150-200 words on ‘How to keep a check on population’. You are Karuna/Karan.

Class 12 Class 11 English
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What is communalism?

Class 12 sociology
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Which part of the brain maintains posture and equilibrium of the body?

Class 10 Biology
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