The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball is thrown with a speed of 40 ms^{-1}ms−1 can go without hitting the ceiling of the hall?
Hmax =gμ2sin2θ=25m =9.8(40)2×sin2θ =25m sin2θ =0.153125 θ=230 Now, Tg2μsinθ =9.82×40×0.4 =3.19sec Now, x = μcosθ×T =40x cos(230) x 3.19 x= 117.62 m Therefore , maximum horizontal distance is 117.62 metres.
