Question

The ceiling of a tunnel is of 5 m high. What is the maximum horizontal distance that a ball thrown with a speed of 20 m/s, can go without hitting the ceiling of the tunnel (g = 10 m/s2)

Answer 1

HEIGHT OF CEILING = 5M

SPEED OF BALL = 20M/SEC

G = 10 M/S2

H MAX < 5 METRES

U^2 SIN^2 Ф/2G <  5

4.9 <  5

MAX HORIZONTAL DISTANCE = 2*H MAX

                                                    = 2*4.9

                                                     = 9.8 METRES