Questions
A projectile is fired at an angle of 300 to the horizontal such that the vertical component of its initial velocity is 80 . Its time of flight is T. Its velocity at t = T/4 has a magnitude of nearly
detailed solution
Correct option is D
tan30°=uyux∴ 13=80ux or ux=803 ms-1T=2uyg=2×8010=16 sAt t=T4=4 s⇒vx=ux=803 ms-1 and vy=uy+ayt or vy=80+(-10)(4)=40 ms-1∴ Velocity =803)2+(40)2=144.2 ms-1Talk to our academic expert!
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