Question

Time of flight of an object if projected with 20 m/s and at maximum height speed is 12m/s

Answer 1

Hmax = u^2sin^2thetha/2

=sin^2 thetha=12*20/400

                     =240/100=0.6

Sinthetha=root0.6=0.77

Therfore sin thetha is 0.77

Tf=2usinthetha/g

=2*20*0.77/10

=3.08 seconds