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A satellite in force-free space sweeps stationary interplanetary dust at a rate where M is the mass, v is the velocity of the satellite and is a constant. What is the deacceleration of the satellite
∴
Swimming is possible on account of
Swimming is a result of pushing water in the opposite direction of the motion.
On a stationary sail-boat, air is blown at the sails from a fan attached to the boat. The boat will
The force exerted by the air of fan on the boat is internal and for motion external force is required.
A man is standing at a spring platform. Reading of spring balance is 60 kg wt. If man jumps outside platform, then reading of spring balance
For jumping he presses the spring platform, so the reading of spring balance increases first and finally it becomes zero.
A player caught a cricket ball of mass 150 gm moving at a rate of 20 m/s. If the catching process be completed in 0.1 s, then the force of the blow exerted by the ball on the hands of the player is
Force exerted by the ball on hands of the player
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
In which of the following cases forces may not be required to keep the
If momentum remains constant then force will be zero because
A ball of mass 150g starts moving with an acceleration of 20 m/s2. When hit by a force, which acts on it for 0.1 sec. The impulsive force is
Impulse = Force × time = m a t
A body, whose momentum is constant, must have constant
For a given mass . If the momentum is constant then it's velocity must have constant.
Rocket engines lift a rocket from the earth surface because hot gas with high velocity
It works on the principle of conservation of momentum.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.