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A stone is projectef from level ground s...

A stone is projectef from level ground such that its horizontal and vertical components of initial velocity are `u_x=10(m)/(s)` and `u_y=20(m)/(s)` respectively. Then the angle between velocity vector of stone one second before and one second after it attains maximum height is:

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AAKASH SERIES-MOTION IN A PLANE-NUMERICAL EXERCISE (LEVEL -1)
  1. A body is projected with velocity u such that in horizontal range and ...

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  2. A stone is projected from the ground with a velocity of 20 m/s at angl...

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  3. A stone is projectef from level ground such that its horizontal and ve...

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  4. A particle is projected from a horizontal floor with speed 10(m)/(s) a...

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  5. A body projected with velocity 30 ms^(-1) reaches its maximum height ...

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

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  7. Two bodies are thrown at angles theta and (90- theta ) from the sa...

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  8. The minimum and maximum velocities of a projectile are 10ms^(-1) and 2...

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  9. A body is projected with a velocity of 30m/s to have to horizontal r...

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  10. A rod AB of length 2L and mass m is lying on a horizontal frictionless...

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  11. A body is projected with an initial velocity of 58.8 m/s at angle 60° ...

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  12. A call is connected between the point A and C of a circular conductor ...

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  13. A body is projected at 60^(@) with the horizontal with the velocity of...

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  14. A particle is projected from a horizontal floor with speed 10(m)/(s) a...

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  15. An object is projected vertically up from the earth’s surface with vel...

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  16. A rod AB of length 2L and mass m is lying on a horizontal frictionless...

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  17. Two tall buildings are 40 m apart. With what speed must a ball be thro...

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  18. From the top of a cliff of height 19.6m a ball is projected horizonta...

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  19. A cricket player throws the ball to have the maximum horizontal rang...

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  20. A ball is projected horizontally from the top of a building 19.6 m hig...

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