Laws of Motion

Related Questions

• A machine gun is mounted on a 2000 kg car on a horizontal frictionless surface. At some instant the gun fires bullets of mass 10 gm with a velocity of 500 m/sec with respect to the car. The number of bullets fired per second is ten. The average thrust on the system is

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• A body of mass 1.0kg is falling with an acceleration of 10 $m/se{c^2}$. Its apparent weight will be $(g = 10m/{\sec ^2})$

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• A body of weight 64 N is pushed with just enough force to start it moving across a horizontal floor and the same force continues to act afterwards. If the coefficients of static and dynamic friction are 0.6 and 0.4 respectively, the acceleration of the body will be (Acceleration due to gravity = g)

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• In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s. The velocity of the gases ejected from the rocket is $5 \times {10^4}\,m/s$. The thrust on the rocket is

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• Which of the following statements is not true

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