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Home / Doubts and Solutions/NEET/Physics

A body is thrown horizontally from the top of a tower. It reaches the ground after 4s at an angle45°to the ground. The velocity of projection is

Asked by valavanvino1011 11th August 2018, 4:00 AM
Answered by Expert
Answer:
As shown in figure, when the projectile hitting the ground by making an angle 45º with horizontal,
its vertical component velocity uv and horizontal component velocity uh are same because (uv / uh ) = tan45.
 
vertical component uv is velocity gained in 4s in gravitational field, hence uv = 4g because
initial value of vertical component velocity is zero.
 
Since horizontal component uh is unaffected by gravity, velocity of projection is 4g or 39.2 m/s
Answered by Expert 11th August 2018, 10:45 AM
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