Question 1 Report
If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s2)
Answer Details
For maximum range (Rmax)
Rmax = U2 ÷ α g where Rmax = 36m, U2 = ?, g = 9.8m/s2
36 = U2 ÷ 2 × 8.8
U2 = 36 × 2 × 9.8m = 705.8
√U = √ 705.6 = 26.5 (squaring both side)
u= 26.5m/s, U = 27m/s (Approx.)
The speed of projection = 27m/s2