Physics
Practice Physics MCQs from the Science syllabus.
A body of mass m is thrown at an angle theta with the horizontal. At the highest point, its kinetic energy is:
A body is moved from rest along a straight line by a machine delivering constant power. The velocity at time t is proportional to:
The potential energy of a system increases if work is done:
If a body of mass m starts falling from point A at height h, what is its velocity at point B which is at height h/2?
A particle moves under the influence of a force F = cx from x=0 to x=x1. The work done is:
The stopping distance of a car is 40 m when moving at 20 m/s. If the same car moves at 40 m/s, the stopping distance is:
Water is falling from a waterfall at the rate of 100 kg/s on the blades of a turbine. If the height of the fall is 100 m, the power delivered to the turbine is (g=10):
A body of mass 5 kg is falling from a height of 10 m. What is its kinetic energy at the midpoint of its fall?
What is the work done by friction on a body of mass m sliding down an inclined plane of length L and inclination angle theta?
The energy equivalent of 1 amu (atomic mass unit) is approximately:
If air resistance is not negligible, the total mechanical energy of a falling body:
A bullet loses 1/20th of its velocity in passing through a plank. What is the minimum number of such planks required to stop the bullet?
A ball of mass m is dropped from height h. It rebounds to height h1. The energy lost is:
A human heart discharges 75 cc of blood at each beat against a pressure of 0.1 m of Hg. If the pulse rate is 80 per minute, the power of the heart is (density of Hg=13.6g/cc):
A wire is stretched by 1 mm by a force of 1 kN. The work done in stretching is:
The work done to rotate a dipole in an electric field depends on:
If a body moves with a velocity v and an acceleration a, the power P delivered by the force is:
A body of mass 10 kg is pushed with a force of 50 N up an inclined plane of 30 degrees for 10 m. Work done by the force is:
Which law states that energy can neither be created nor destroyed?
What is the power of a bulb that consumes 1000 J in 5 seconds?