CBSE Class 11-science Answered
A bullet fired at an angle of 30° with the horizontal hits the ground 3km away.By adjusting the angle of projection and keeping the muzzle speed same show if one can hit a target 5km away.
Asked by tps.mjmdr | 09 Jul, 2018, 09:47: PM
Expert Answer
Range R of the projectile is given by,
where u and α are velocity and angle of projection. g is acceleration due to gravity.
velocity of projection u that can be obtained from (1) is,
From eqn.(1), it can be seen that range R will be maximum when α = 45º and
maximum range Rmax = (u2 / g ) = (184.25×184.25)/9.8 = 3464 m
Hence by keeping the same muzzle speed u, one can not hit a target which is 5 km away
just by changing projection angle.
Answered by Thiyagarajan K | 09 Jul, 2018, 11:28: PM
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