Laws of Motion questions
1031 published questions with worked solutions.
- A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5...
- An army vehicle of mass 1000 kg is moving with a velocity of 10 m/s and is acted upon by a forward force of 1000 N due to the...
- The ratio of the weight of a man in a stationary lift and when it is moving down with uniform acceleration 'a' is 3 : 2. The...
- Newton's second law gives a measure of
- Two forces of 5 N each are applied at the two ends of a light, stretched spring, pulling it outward in opposite directions (5 N ←...
- Sand is being dropped onto a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant...
- A particle of mass 0.3 kg is subjected to a force F = −kx with k = 15 N/m. What will be its initial acceleration if it is...
- A gun fires N bullets per second, each of mass m, with velocity v. The force exerted by the bullets on the gun is
- A book is lying on a table. What is the angle between the action of the book on the table and the reaction of the table on the...
- A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on the control panel. The lift starts moving...
- The formula for the "true" (general) force is
- A lift of mass 1000 kg is moving with an acceleration of 1 m/s² in the upward direction. The tension developed in the string...
- A person is standing in an elevator. In which situation does he find his weight less than his actual weight?
- In an elevator moving vertically up with an acceleration g, the force exerted on the floor by a passenger of mass M is
- A spring balance inside a lift suspends an object. As the lift begins to ascend, the reading indicated by the spring balance will
- A student attempts to pull himself up by tugging on his own hair. He will not succeed because
- A sphere is accelerated upwards by a cord whose breaking strength is four times its weight. The maximum acceleration with which...
- A plumb line is suspended from the ceiling of a car moving with horizontal acceleration a. What will be the angle of inclination...
- A boy having a mass of 40 kilograms is standing in an elevator. The force felt by the feet of the boy will be greatest when the...
- A vehicle of 100 kg is moving with a velocity of 5 m/sec. To stop it in 1/10 sec, the required force in the opposite direction is
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