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In a projectile motion the velocity...

In a projectile motion the velocity

A

is always perpendicular to the acceleration

B

is never perpendicular to the acceleration

C

is perpendicular to the acceleration for one instant only

D

is perpendicular to the acceleration for two instant

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The correct Answer is:
C
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MOTION-KINEMATICS-EXERCISE 1 OBJECTIVE PROBLEMS
  1. A body is thrown with a velocity of 9.8 m//s making an angle of 30^(@)...

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  2. A projectile thrown with a speed v at an angle theta has a range R on...

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  3. In a projectile motion the velocity

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  4. Two projectiles A and B are projected with an angle of projection 15^(...

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  5. A ball is thrown upwards and returns to the ground describing a parabo...

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  6. The angle of projection of a body is 15^(@).. The other angle for whic...

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  7. A stone is thrown at an angle of 45^(@) to the horizontal with kinetic...

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  8. The maximum range of a projectile is 22 m. When it is thrown at an ang...

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  9. The equation of projectile is y = 16 x - (5 x^2)/(4). Find the horizon...

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  10. If four balls A,B,C,D are projected with same speed at angles of 15^(@...

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  11. The velocity at the maximum height of a projectile is half of its velo...

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  12. A ball P is dropped vertically and another ball Q is thrown horizont...

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  13. An aeroplane is flying at a height of 1960 m in horizontal direction w...

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  14. A ball is hit by a batsman at an angle of 37^(@) as shown in figure. T...

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  15. Trajectories of two projectiles are shown in figure.Let T(1) and T(2) ...

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  16. A hollow vertical cylinder of radius r and height h has a smooth inter...

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  17. Time taken by the particle to reach from A to B is t. Then the distanc...

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  18. Rank the launch angles for the five paths in the figure below with res...

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  19. A particle is projected with a velocity of 20 m/s at an angle of 30^(@...

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  20. Two trains, each 50 m long, are travelling in opposite directions with...

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