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A ball of mass 50 g is dropped from a he...

A ball of mass 50 g is dropped from a height of 20 m. A boy on the ground hits the ball vertically upwards with a bat with an average force of 200 N, so that it attains a vertical height of 45 m. The time for which the ball remains in contact with the bat is [Take `g=10m//s^(2)]`

A

`1//20^(th)` of a second

B

`1//40^(th)` of a second

C

`1//80^(th)` of a second

D

`1//120^(th)` of a second

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AAKASH INSTITUTE ENGLISH-LAWS OF MOTION-Assignment (SECTION-A)
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  2. A 10 g bullet moving at 200 m/s stops after penetrating 5 cm of wooden...

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  3. A ball of mass 50 g is dropped from a height of 20 m. A boy on the gro...

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  4. A string tied on a roof can bear a maximum tension of 50 kg wt. The mi...

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  5. In the following figure, the object of mass m is held at rest by a hor...

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  6. In accordance with Newton’s third law of motion -

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  7. When a 4 kg rifle is fired, the 10g bullet receives an acceleration of...

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  8. A man of mass 50 kg carries a bag of weright 40 N on his shoulder. The...

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  9. A block of mass m is placed on a smooth inclined plane of inclination ...

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  10. In which of the following graphs, the total change in momentum is zero...

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  11. A weight mg is suspended from the middle of a rope whose ends are at t...

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  12. Two masses 10 kg and 20kg resplectivley are connected by a massless sp...

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  13. Tension in the rope at the rigid support is (g=10m//s^(2))

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  14. Two bodies of masses m(1) " and " m(2) are connected a light string wh...

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  15. In the figure given below, with what acceleration does the block of ma...

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  16. T(1) and T(2) in the given figure are

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  17. In the arrangement shown, the mass m will ascend with an acceleration ...

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  18. A chain of mass M and length L is held vertical by fixing its upper en...

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  19. A man slides down a light rope whose breaking strength in eta times hi...

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  20. In the arrangement as shown, tension T(2) is (g=10m//s^(2))

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