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The driver of a three-wheeler moving wit...

The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle ? The mass of the three-wheeler is 400 kg and the mass of the driver is 65 kg.

A

`1.2 xx 10^(3) N`

B

`1.2 xx 10^(4)` N

C

`1.2 xx 10^(5) N`

D

`1.2 xx 10^(6) N`

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The correct Answer is:
B
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - II
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  2. When a force 1N acts on 1kg mass at rest for 1s, its final momentum is...

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  3. The driver of a three-wheeler moving with a speed of 36 km/h sees a ch...

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  4. A force of 25 N acts on a body at rest for 0.2s and a force of 70 N ac...

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  5. A player caught a cricket ball of mass 150 g moving at a rate of 20 m/...

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  6. A body of mass 3 kg is moving along a straight line with a velocity of...

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  7. A balloon with its contents weighing 160 N is moving down with an acce...

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  8. A block of mass 5 kg is at rest on a smooth horizontal surface. Water ...

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  9. A horizontal jet of water coming out of a pipe of area of cross - sect...

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  10. A body of mass 2kg is moving along positive X - direction with a veloc...

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  11. A disc of mass 5 kg is kept floating horizontally in mid air by firin...

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  12. A body of mass 5 kg moving on a horizontal surface with a velocity of ...

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  13. A machine gun fires a bullet of mass 40 g with a velocity 1200 ms^-1. ...

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  14. Gravel is dropped on a conveyor belt at the rate of 2 kg/s. The extra ...

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  15. A hammer of mass 1 kg strikes on Ihe head of a nail with a velocity of...

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  16. A force of 5 N acts on a body for 2 milliseconds. Calculate the impuls...

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  17. A ball reaches a racket at 60m//s along +X direction and leaves the ra...

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  18. A force lime graph for the motion of a body is as shown in figure. Cha...

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

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  20. The linear momentum of a particle as a function of time t is given by ...

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