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Free Online Mock Physics Multiple Choice Test on workenergy power
Sub Category : workenergy power Test : 8 Time Left :
1)What percentage of kinetic energy of a moving particle is transferred to a stationary particle when it suffers one-dimensional elastic collision with the stationary particle? [ Given : mass of stationary particle = mass of moving particle], what percentage will be transferred if the mass of the stationary particle is three times the mass of moving paticle
(1) 25% (2) 50% (3) 75% (4)100%
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2) Which of the following is a correct statement(1) When a ball hits the floor and rebounds after an inelastic collision, the total momentum of the ball-earth system is conserved. (2) A retarding force does negative work on a body (3) When a block of mass m slides down an inclined plane of inclination θ through a distance l, the work done against frictional force is μmg cos θ is the coefficient of friction (4) All of the above
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3) One end of a light spring of spring constant k is fixed to a wall and the other end is tied to a block on a smooth horizontal surface. In a certain displacement x, the work done by the spring is kx2 . The possible cases are(1) the spring was initially compressed by a distance x and was finally in its natural length (2) it was initially stretched by a distance x and finally was in its natural length. (3) it was initially in its natural length and finally in a compressed position. (4) it was initially in its natural length and finally in a stretched position
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4) You lift a suitcase from the floor and keep it on a table. The work done by you on the suitcase does not depend on
(1) the path taken by the suitcase (2) the time taken by you in doing so (3) the weight of the suitcase (4) your weight
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5) Which of the following is correct?(1) If F vector not equal to 0and S vector and F vector.S vector = 0, then F vector S vector(2) The wok done on a body does not depend upon the initial velocity of the body. (3) In an inelastic collision, kinetic energy is not conserved but momentum is conserved (4) Collision is said to be elastic if the two bodies stick together after the collision
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