Question

A projectile is thrown with speed 40m/s at angle x from horizontal. It is found that projectile is at same height at 1s and 3s. What is the angle of projection??
I want answer in tan x

Answer 1

Explanation:

T=2usin¢/g :time of flight is given by this formula

Sin ¢ =gT/u

Now,

Sin¢=2*40/10=1/2

¢=30°

Putting the value of ¢in tan we get,

Tan 30°=1/√3

¢=tan-1(1/√3)