Two bodies of masses m₁ and m₂ are initially at rest at infinite distance apart.They are then allowed to move towards each other under mutual gravitational attraction with the escape velocity .Their relative velocity of […]
For a satellite escape velocity is 11 kms⁻¹.If the satellite is launched at an angle of 60°with the vertical, then escape velocity will be
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(a) 11 kms⁻¹ (b) 11√3 kms⁻¹ (c) 11 / […]
The moon’s radius is 1/ 4 that of the earth and its mass is 1 / 80 times that of the earth.If g represents the acceleration due to gravity on the surface of the earth, […]
A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel.The lift starts moving upwards with an acceleration 1.0 m/s². If g = 10 ms⁻², […]
A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when […]
A car of mass m is moving on a level circular track of radius R. If µs represents the static friction between the road and tyres of the car, the maximum speed of the car […]
A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is
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(a) MV (b) 1.5 MV […]
A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is :
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(a) […]
Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be:
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(a) […]
A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it. The coefficient of friction between them is µ = 0.5. The distance that the box will […]
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