Project (2.99999...)
A boy throws a ball at an angle of with the ground and with an initial velocity of . The rate at which his number of followers increase at Brilliant is 2 followers per second. How many followers will he have gained when the ball reaches the ground?
The answer is 8.
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1 solution
as time taken in complete projectile =2usin(a)/g where u=initial velocity a is the angle with which ball is projected. g=acceleration due to gravity=9.8m/s therefore, time taken=(2 40sin30)/10 =4sec as followers increase at the rate of 2 per sec.... number of followers in 4 sec =4 2=8