Physics Question bank - set 6 (CBSE class 11 special)
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Solving these problems will help you strengthen your base and understanding.
1) A body at rest explodes in three fragments. Is it possible that two equal parts move in mutually perpendicular directions with the same velocity and third mass moves midway between the two?
2) If the speed of a moving vehicle is increased by 200% then how much should be the change in the retarding force to stop the vehicle over half the previous distance?
3) If 20 Joules of work is done in compressing a spring from 0 cm to 6 cm then find the work done in compressing the same from3cm to 6 cm.
4)Does the work done on a body by a force depend upon the path followed by it?
5) A ball is dropped from rest at a height of 20m. If it loses 30% of its kinetic energy on striking the ground,what is the height to which it bounces? How do you account for this loss in kinetic energy?
6) Why is no energy being consumed in planetary motion?
7) A truck and a car are moving with the same K.E. on a straight line road. If their engines are made off at the same time, which one of them will stop at a lesser distance?
8) The power of a pump motor is 4KW. How much water in kg/minute can it raise a height of 20m? (g = 10 m/s2)
9) Is it possible for work to be positive negative or zero? "Explain with example.
10) The bob of a simple pendulum isreleased from a horizontal position. If the length of the pendulum is 2m, whatis the speed with which the bob arrives at the lowermost point? Given that itdissipates 10% of its initial energy against air resistance?
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Solving these problems will help you strengthen your base and understanding.
1) A body at rest explodes in three fragments. Is it possible that two equal parts move in mutually perpendicular directions with the same velocity and third mass moves midway between the two?
2) If the speed of a moving vehicle is increased by 200% then how much should be the change in the retarding force to stop the vehicle over half the previous distance?
3) If 20 Joules of work is done in compressing a spring from 0 cm to 6 cm then find the work done in compressing the same from3cm to 6 cm.
4)Does the work done on a body by a force depend upon the path followed by it?
5) A ball is dropped from rest at a height of 20m. If it loses 30% of its kinetic energy on striking the ground,what is the height to which it bounces? How do you account for this loss in kinetic energy?
6) Why is no energy being consumed in planetary motion?
7) A truck and a car are moving with the same K.E. on a straight line road. If their engines are made off at the same time, which one of them will stop at a lesser distance?
8) The power of a pump motor is 4KW. How much water in kg/minute can it raise a height of 20m? (g = 10 m/s2)
9) Is it possible for work to be positive negative or zero? "Explain with example.
10) The bob of a simple pendulum isreleased from a horizontal position. If the length of the pendulum is 2m, whatis the speed with which the bob arrives at the lowermost point? Given that itdissipates 10% of its initial energy against air resistance?
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