If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s2)
a
19m/s
b
2m/s
c
4m/s2
d
7m/s2
Explanation
Correct Option
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Destinedtowin
4 years ago
Rmax=U^2/g
Parameters given Rmax=36,g=9.8,U=?
36=U^2/9.8
U^2=36*9.8
U^2=352.8
square root both sides
u=19

Award0001
2 years ago
for a projectile, Range is maximum at an angle of projection of 45°
R = u²sin2@/g
sin(2×45) = sin90 = 1
R = u²/g
u² = R×g = 36×9.8 = 352.8
u = √352.8 = 18.78 = 19m/s


