Projectile at an angle | Two-dimensional motion

In this example, what it the initial vertical velocity, v_i,y?

• 5 m/s

• .5 m/s

• 10 m/s

• 20 m/s

What is the change in vertical velocity, ?

Remember: change = final - initial

• -10 m/s

• 0

• 5 m/s

• 1 m/s

Using the formula:

, 

where

vx is horizontal velocity

 is horizontal displacement or range

t is time that the projectile is in air

What is the projectile's range?

• 8.83 m

• 8.48 m

• 5 m

• 9.66 m

Extension question:

A projectile is launched from the ground at point A and it takes a time of  t  to land to the ground at point C, how long did it take the projectile to reach the maximum height, point B?

• t/2

• t/4

• t

• 2t