# If a projectile is shot at an angle of #(2pi)/3# and at a velocity of #19 m/s#, when will it reach its maximum height?

##### 1 Answer

Jul 1, 2017

#### Answer:

#### Explanation:

We're asked to find the *time* when a projectile reaches its maximum height, given its initial velocity.

When the projectile is at its maximum height, its **instantaneous #y#-velocity is zero**.

We can use the equation

to find the time.

The initial

And

Plugging in known values, we have