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A force exerts an impulse I on a particl...

A force exerts an impulse I on a particle changing its speed from u to 2u. The applied force and the initial velocity are oppositely directed along the same line. The work done by the force is

A

`3/2Iu`

B

`1/2Iu`

C

Iu

D

2Iu

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The correct Answer is:
B
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MOTION-CENTRE OF MASS-Exercise - 1
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  2. A super-ball of mass m is to bounce elastically back and forth between...

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  4. A boy hits a baseball with a bat and imparts and impulse J to the ball...

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  5. A system of two blocks A and B are connected by an inextensible massle...

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  6. The position-time graph of a particle of mass 0.1 kg is shown. The imp...

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  7. The magnitude of force (in Newtons) acting on a body varies with time ...

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  8. An impulse vec(I) changes the velocity of a particle from vec(v)(1) to...

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  9. Two blocks of masses 10 kg and 4 kg are connected by a spring of negli...

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  10. A ball strikes a smooth horizontal ground at an angle of 45^(@) with t...

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  11. In an inelastic collision-

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  12. Two perfectly elastic balls of same mass m are moving with velocities ...

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  13. When two bodies collide elastically, then

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  14. A ball hits the floor and rebounds after an inelastic collision . In t...

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  15. Six steel balls of identical size are lined up long a straight frictio...

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  16. The bob of a simple pendulum of length l dropped from a horizontal pos...

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  17. Two balls A and B having masses 1 kg and 2 kg, moving with speeds 21 m...

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  18. A truck moving on horizontal road east with velocity 20ms^(–1) collide...

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  19. A sphere of mass m moving with a constant velocity hits another statio...

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  20. Three blocks are initially placed as shown in the figure. Block A has ...

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