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From an inclined palne two particles P,Q...

From an inclined palne two particles `P,Q` are projected with same speed at same angle `theta`,one up and other down the plane as shown in figure.Which of the following statement(s) is/are correct ?

A

The particles will collide the plane with same speed

B

The times of flight of each particle are same

C

Both particles strike the plane perpendicularly

D

The particles will collide in mid air if projected simultaneously and time of flight of each particle is less than the time of collision

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The correct Answer is:
B, D
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