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A gun fires a bullet at a speed of 140 m...

A gun fires a bullet at a speed of 140 `ms^(-1)`. If the bullet is to hit a target at the same level as the gun and at 1km distance, the angle of projection may be

A

`60^(@) or 30^(@)`

B

`40^(@) or 50^(@)`

C

`15^(@) or 75^(@)`

D

`20^(@) or 70^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-MOTION IN A PLANE-EXERCISE-2 (Oblique project
  1. The potential energy of a projectile at maximum height is 3/4 times ki...

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  2. Two bodies are thrown from the same point with the same velocity of 50...

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  3. A gun fires a bullet at a speed of 140 ms^(-1). If the bullet is to hi...

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  4. A body is projected with velocity 24 ms^(-1) making an angle 30° with...

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  5. A particle is thrown with velocity u at an angle prop from the horizon...

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  6. The equation of trajectory of a projectile is y=10x-(5/9)x^(2). If we ...

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  7. An object is projected with a velocity of 20ms^(-1) making an angle of...

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  8. For a projectile, the ratio of maximum height reached to the square of...

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  9. The speed of a projectile at its maximum height is sqrt(3) //2 times i...

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  10. The velocity at the maximum height of a projectile is half of its init...

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  11. A person throws a bottle into a dustbin at the same height as he is 2m...

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  12. A body is projected at angle 30° to horizontal with a velocity 50 ms^(...

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  13. A body is projected at angle 30° to horizontal on a planet with a velo...

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  14. A body is projected at angle 30° to horizontal on a planet with a velo...

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  15. Abody is thrown with velocity (4i +3j) metre per second. Its maximum h...

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  16. Two particles are projected with same velocity but at angles of projec...

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  17. The potential energy of a projectile at its maximum height is equal to...

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  18. If the maximum vertical height and horizontal ranges of a projectile a...

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  19. A body is projected with a certain speed at angles of projection of th...

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  20. From a point on the ground a particle is projected with initial veloci...

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