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A car is travelling along a flyover brid...

A car is travelling along a flyover bridge which is a part of vertical circle of radius `10m`. At the highest point of it the normal reaction on the car is half of it’s weight, the speed of car is

A

`7 m/s`

B

`10 m/s`

C

`14 m/s`

D

`20 m/s`

Text Solution

Verified by Experts

The correct Answer is:
`(1)`
Normal reaction, `N = mg - mv^(2)/r`
Given that `N = mg/2`
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NARAYNA-WORK , ENERGY & POWER -EXERCISE - 1 (C.W)
  1. A body of mass m is rotated in a vertical circle with help of light st...

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  2. A vehicle is travelling with uniform speed along a concave road of rad...

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  3. A car is travelling along a flyover bridge which is a part of vertical...

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  4. A very small particle rests on the top of a hemisphere of ra...

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  5. Two steel balls A and B of mass 10 kg and 10 g rolls towards each othe...

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  6. Two identical balls moving in opposite direction with speed 20 m/s and...

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  7. A ball of mass 5 kg moving with speed 8 m/s collides head on with anot...

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  8. A ball is dropped on a horizontal surface from height h. If it rebound...

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  9. A ball of 4 kg mass moving with a speed of 3ms^(-1) has a head on elas...

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  10. A ping-pong ball strikes a wall with a velocity of 10 ms^(-1). If the ...

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  11. Two identical balls collide head on. The initial velocity of one is 0....

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  12. A truck of mass 15 tons moving with 1 ms^(-1) collides with a stationa...

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  13. In the above problem the total KE before collision is

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  14. In the above problem loss of KE during collision is

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  15. A bullet of mass 'x' moves with a velocity y, hits a wooden block of m...

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  16. A railway truck of mass 16000 kg moving with a velocity of 5ms^(-1) st...

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  17. A ball falls from a height of 10m on to a horizontal plane. If the coe...

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  18. A ball is dropped from a height of 3m. If coefficient of restitution b...

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  19. A glass sphere of mass 5mg, falls from a height of 3 meters on to a ho...

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  20. A particle falls from a height h upon a fixed horizontal plane and reb...

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