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Question
A particle is projected with a velocity of 20 m/s at an angle of 30∘ to an inclined plane of inclination 30∘ to the horizontal. The particle hits the inclined plane at an angle 30∘, during its journey. The time of flight in seconds is -
A particle is projected with a velocity of 20 m/s at an angle of 30∘ to an inclined plane of inclination 30∘ to the horizontal. The particle hits the inclined plane at an angle 30∘, during its journey. The time of flight in seconds is -
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Solution
The correct option is A 4√3
As we know that the time of flight
T=2u sin θgeff=2uygeff=2×sin 30∘×20g cos 30∘
T=40g×√3212=40√3g=4/√3.
As we know that the time of flight
T=2u sin θgeff=2uygeff=2×sin 30∘×20g cos 30∘
T=40g×√3212=40√3g=4/√3.
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