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A and B are two trains moving parallel t...

A and B are two trains moving parallel to each other. If a ball is thrown vertically up from the train A, the path of the ball is

A

parabola for an observer standing on the ground

B

vertical straight line for an observer in B when B is moving with the same speed in the same direction of A

C

a parabola for an observer in B when B is moving with same speed but in opposite direction

D

all the above are true

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The correct Answer is:
D
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AAKASH SERIES-MOTION IN A PLANE -Exercise -I
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  6. Two particles are projected from the same point with the same speed at...

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  7. A body is projected with an initial speed of 100 sqrt(3) ms^(-1) at an...

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  8. Two bodies are projected at angles 30^(@) and 60^(@) to the horizontal...

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  9. Velocity of the body on reaching the ground is same in magnitude in th...

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  10. A bomber flying horizontally with constant speed releases a bomb from ...

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  11. For a projectile .R. is range and .H. is maximum height

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  12. The equation of motion of a projectile is y=ax-bx^(2) , where a and b ...

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  13. The term centripetal acceleration was proposed by

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  14. Centripetal acceleration is

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  15. Velocity vector and acceleration vector in a uniform circulat motion a...

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  16. When milk is churned, cream gets seperated due to

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  17. Suppose a disc is rotating counter clockwise in the plane of the paper...

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  18. A particle of mass M moves in a circular path of radius r with a const...

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  19. A body is in pure rotation. The linear speed v of the particle, the di...

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  20. A particle revolves round a circular path. The acceleration of the par...

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