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