Questions
A particle is projected from the ground at an angle with the horizontal with an initial speed . Time after which velocity vector of the projectile is perpendicular to the initial velocity.
detailed solution
Correct option is A
Since, v⊥u or v·u=0or (u+gt)·u=0or u·u+(g·u)t=0or u2+gutcos90°+θ=0 (Angle between u and g is 90° + θ)or u-gtsinθ=0∴ t=ugsinθTalk to our academic expert!
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A ball is thrown with a velocity of u making an angle with the horizontal. Its velocity vector normal to initial vector (u) after a time interval of
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