HONORS PHYSICS 101

Kinematics 3
AMDG
Name ______________________________
Date ________
Use kinematics equation #3 only
(
p
lease
write the equation first, before substituting
and solving)
1.
A
small airplane accelerates at 3.1 m/s
2
. If the takeoff velocity must be 39.5 m/s, and
the plane
starts from rest, what length runway is needed?
2.
A truck skids to a halt in 50 meters. If it was originally moving at 17 m/s, what was
its acceleration?
HONORS PHYSICS 101

Kinematics 3
AMDG
3.
A rocket reaches a velocity of 4 x 10
4
m/s after accelerating at 5.4 x 10
3
m
/s
2
for 1.3 x
10
5
meters. What was its original velocity?
4.
Two cars are traveling along a straight line in the same direction, the lead car at 25
m/s and the following car at 30 m/s. At the moment the cars are 40 meters apart, the
lead driver
hits the brakes causing his car to have an acceleration of
–
2.0 m/s
2
.
a) How far does the lead car travel during this time?
b) Assuming that the chasing car brakes at the
exact same moment
as the lead car,
what must be the chasing car’s minimum acceleratio
n to avoid hitting the lead car?
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