1. A basketball player jumped straight up to grab a rebound. If she was in the air for 0.80
seconds, how high did she jump?
Variable Value
v0 ?
v 0 m/s
Δy FIND
a -9.8 m/s2
t 0.40 s
Answer: Define up as the positive y-direction. Note that if basketball
player is in the air for 0.80 seconds, she reaches her maximum
height at a time of 0.40 seconds, at which point her velocity is
zero.
Can’t solve for Δx directly with given information, so find v0 first.
Now with v0 known, solve for Δx.

2. Question: Which graph best represents
the relationship between the acceleration
of an object falling freely near the surface
of Earth and the time that it falls?
Answer: (4) The acceleration due to
gravity is a constant 9.8 m/s2 down on the
surface of the Earth.