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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
Max Range = \(\frac{u^2}{\text{g}}\)
36 = \(\frac{u^2}{9.8}\)
u\(^2\) = 36 x 9.8 = 352.8
u = \(\sqrt{352.8}\) ≈ 18.78m/s
Source: Myschool Past Questions Archive (Record #40894)