Agirl throws a tennis ball upward with an initial velocity of 4 m/s. what is the maximum displacement of the ball?
a.) 0.2m up
b.) 0.4m up
c.)0.8m up
d.)1.6m up

This is done using the following equations of straight-line motion:

Vf = Vi + a*t

Where: Vf = final velocity
Vi = initial velocity
a = acceleration (in this case, gravity)
t = time

We first have to determine how long it stays in the air on the way up. Substituting the given values and solving for t:

0 = 4 + (-9.8)*t
t = -4 / -9.8
t = 0.41s

Using the following equation to solve for displacement, s:

s = Vi * t + 1/2 (a*t^2)
s = 4*0.41 + 1/2 ((-9.8)(0.41^2))
s = 0.81 m

Therefore, the displacement of the ball upwards is 0.8 meters. Among the choices, the correct answer is C.

The percentage of the drink that finds the target and lands in your mouth.