Laws of Motion

Related Questions

• Action and reaction forces act on

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• A rocket with a lift- off mass $3.5 \times {10^4}$$kg$ is blasted upwards with an initial acceleration of $10m/{s^2}.$ Then the initial thrust of the blast is

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• Work done by a frictional force is

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• A mass 1 kg is suspended by a thread. It is (i) lifted up with an acceleration $4.9\,m/{s^2}$ (ii) lowered with an acceleration $4.9\,m/{s^2}$. The ratio of the tensions is

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• A rocket has a mass of 100 kg. 90% of this is fuel. It ejects fuel vapours at the rate of 1 kg/sec with a velocity of 500 m/sec relative to the rocket. It is supposed that the rocket is outside the gravitational field. The initial upthrust on the rocket when it just starts moving upwards is

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