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A body is projected vertically upwards. ...

A body is projected vertically upwards. Its momentum is gradually decreasing. In this

A

It is a violation of law of conservation of linear momentum

B

momentum of the body alone gets conserved

C

momentum of the body, earth and air molecules together remains constant

D

violates law of conservation of energy

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The correct Answer is:
C
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - I
  1. A block moving in air breaks in two parts and the parts separate

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  2. A ball with initial momentum P collides with rigid wall elastically. I...

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  3. A body is projected vertically upwards. Its momentum is gradually decr...

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  4. Assertion: A rocket moves forward by pushing the surrounding air backw...

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  5. A ball falls towards the earth. Which of the following is correct?

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  6. A man is standing in the middle of a perfectly smooth 'island of ice' ...

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  7. A block of weight W is suspended from the mid-point of a rope whose en...

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  8. Figure shows a heavy block kept on a frictionless surface and being pu...

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  9. A body of weight w1 is suspended from the ceiling of a room through a...

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  10. The apparent weight of a body

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  11. The apparent weight of a freely falling body is

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  12. A lift is ascending with a constnat speed V. A passenger in the lift d...

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  13. A block of mass m can slide on a smooth inclined plane of inclination ...

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  14. An elevator is moving vertically upward with an acceleration of g . Th...

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  15. A lift is going up with uniform velocity. When brakes are applied, it...

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  16. If the tension in the cable supporting an elevator is equal to the wei...

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  17. A relerence frame atteched to the Earth

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  18. A stationary railway platform on earth is

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  19. A rotating platform for a stationary observer outside, it is

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  20. Frames moving uniformly with respect to an inertial frame are

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