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A ball of mass 0.5 kg moving with a velo...

A ball of mass 0.5 kg moving with a velocity of `2 ms^(-1)` strikes a wall normally and bounces back with the same speed. If the time of contact between the ball and the wall is one millisecond, the average force exerted by the wall on the ball is

A

2000 N

B

1000 N

C

5000 N

D

125 N

Text Solution

Verified by Experts

The correct Answer is:
A
`F_(av)=ma_(av)=m(Delta v)/(Delta t)=(0.5 [2-(-2)])/10^(-3)=2000 N`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-FORCE-Exercise 1
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  3. A ball of mass 0.5 kg moving with a velocity of 2 ms^(-1) strikes a wa...

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  4. A body of mass 5 kg is moving with velocity of v=(2hati+6hatj)ms^(-1) ...

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  5. Find the force exerted by 5 kg block on floor of lift, as shown in fig...

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  6. Three blocks of masses m(1), m(2) and m(3) are connected by massesless...

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  7. Three blocks are placed at rest on a smooth inclined plane with force ...

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

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  9. A block of mass 10 kg is suspended by three strings as shown in the fi...

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  10. If impulse I varies time t as I(kg ms^(-1))=20t^(2)-40t. The change ...

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  11. An initially stationary device lying on a frictionless floor explodes ...

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  12. A bullet of mass 10 g is fired from a gun of mass 1 kg with recoil vel...

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  13. A bullet of mass 0.1 kg is fired with a speed of 100 ms^(-1). The mass...

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  14. A gradener pushes a lawn roller through a distance 20 m. If he applies...

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  15. How much work must work be done by a force on 50 kg body in order to a...

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  16. A force (3 hat(i)+4 hat(j)) acts on a body and displaces it by (3 hat(...

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  17. Force acting on a particale is (2hat(i)+3hat(j))N. Work done by this f...

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  18. A force F = Ay^(2)+By+C acts on a body at rest in the Y-direction. The...

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  19. The force F acting on a particle is moving in a straight line as shown...

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  20. If the force acting on a body is inversely proportional to its speed, ...

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