Questions
A particle is projected with a velocity m/s. The time after which it will start moving perpendicular to its initial direction of motion is
detailed solution
Correct option is D
Given v1 → = 8i^+6j^ m/sAcceleration due to gravity, a→ = -gj^ = -10j^ m/s2Velocity after time t; v1 →. v2→ = 08i^+6j^.8i^+6-10tj^ = 064+6(6-10t) = 064 + 36 - 60t = 060t = 100 t = 53 secTalk to our academic expert!
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A ball is projected obliquely with a velocity 49 ms–1 strikes the ground at a distance of 245 m from the point of projection. It remained in air for
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