Question

If a projectile is shot at an angle of `pi/4` and at a velocity of `4 m/s`, when will it reach its maximum height??

Answer 1

The time is `=0.29s`

Explanation:

Resolving in the vertical direction `uarr^+`

The initial velocity is `u_0=(4)sin(1/4pi)ms^-1`

The time to reach the greatest height is `=ts`

Applying the equation of motion

`v=u+at=u- g t`

The time is `t=(v-u)/(-g)=(0-(4)sin(1/4pi))/(-9.8)=0.29s`