Physics-
General
Easy
Question
A smooth semicircular tube AB of radius r is fixed in a vertical plane r asp r and weight W= pand contains a heavy flexible chain of length shown. Assuming a slight disturbance to start the chain in motion, the velocity v with which it will emerge from the open end B of the tube is
The correct answer is:
Initial CM position Final CM position 
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In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then ÐBFP. will be equal to ____ degrees.
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An arrangement of the masses and pulleys is shown in the figure. Strings connecting masses A and B with pulleys are horizontal and all pulleys and strings are light. Friction coefficient between the surface and the block B is 0.2 and between blocks A and B is 0.7. The system is released from rest (use g = 10 
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where
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A girl is riding on a flat car travelling with a constant velocity 10 ms-1 as shown in the fig. She wishes to throw a ball through a stationary hoop in such a manner that the ball will move horizontally as it passes through the hoop. She throws the ball with an initial speed 
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Two particles instantaneously at A & B respectively 4.5 meters apart are moving with uniform velocities as shown in the figure. The former towards B at 1.5 m/sec and the latter perpendicular to AB at 1.125 m/sec. The instant when they are nearest is:
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A stone is projected from a horizontal plane. It attains maximum height 'H' & strikes a stationary smooth wall & falls on the ground vertically below the maximum height. Assume the collision to be elastic the height of the point on the wall where ball will strike is:
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Which of the following curves may represent the speed of electron in a hydrogen atom as a function of principal quantum number n?
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