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A particle is prjected up an inclined wi...

A particle is prjected up an inclined with initial speed `v=20m//s` at an angle `theta=30^(@)` with the plane. The component of its velocity perpendicular to the plane when it strikes the plane is:

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The correct Answer is:
5
Component of velocity perpendicular to the plane an landing = component of velocity perpendicular to the plane at the point of projection `=20sin 30^(@)=10m//s`.
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