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A particle is projected from a horizonta...

A particle is projected from a horizontal floor with speed `10 m//s` at an angle `30^(@)` with the floor and striking the floor after sometime. State which is correct.

A

velocity of particle will be perpendicular to initial direction two seconds after projection.

B

minimum speed of particle will be `5 m//sec`.

C

Displacement of particle after half second will be `35//4m`.

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
Time of flight of projectile is 1 sec. so after 2 sec. projectile is not in motion the minimum speed of particles is `5sqrt(3)` m/s at the topmost point Displacement of particle after half second will be `sqrt(325/16) m`
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