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A particle is projected in the X-Y plane...

A particle is projected in the `X-Y` plane. `2 sec` after projection the velocity of the particle makes an angle `45^(@)` with the `X-`axis. `4sec` after projection, it moves horizontally. Find the velocity of projection (use `g = 10 ms^(-2))`.

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`20sqrt(5)`.
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MOTION-KINEMATICS-EXERCISE 3 SUBJECTIVE PROBLEMS (Level-1)
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  7. The velocity time graph of a body moving in a straight line is shown. ...

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  8. The velocity- time graph of the particle moving along a straight line ...

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  9. The force acting on a body moving in a straight line is given by F = (...

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  10. A particle moves in xy plane such that v(x)=50-16 t and y=100-4t^(2) w...

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  11. A particle is projected in the X-Y plane. 2 sec after projection the v...

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  12. A particle is projected upwards with a velocity of 100 m//s at an angl...

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  13. A particle is projected in x-y plane with y-axis along vertical, the p...

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  14. A rocket is launched at an angle 53^(@) to the horizontal with an init...

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  15. Two particles are moving along two long straight lines, in the same pl...

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  16. A butterfly is flying with velocity 10hati +12hatj m//s and wind is bl...

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  17. A man with some passengers in his boat, starts perpendicular to flow o...

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  18. A man crosses a river in a boat. If he cross the river in minimum time...

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  19. Rain is falling vertically with a speed of 20ms^(-1)., A person is run...

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  20. A glass wind screen whose inclination with the vertical can be changed...

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