# If a projectile is shot at an angle of #(pi)/8# and at a velocity of #21 m/s#, when will it reach its maximum height?

##### 1 Answer

Apr 1, 2018

The time is

#### Explanation:

Resolving in the vertical direction

The initial velocity is

At the greatest height,

The acceleration due to gravity is

The time to reach the greatest height is

Applying the equation of motion

The time is