Free fall
is constantacceleration motion with
Motion on an inclined plane
has
The sign depends on the direction of the tilt.
a
s
5 6
g
sin
u
.
a
y
5 2
g
5 2
9.80 m/s
2
S U M M A R Y
The goal of Chapter 2 has been to learn how to solve problems about motion in a straight line.
General Principles
Kinematics
describes motion in terms of position, velocity, and acceleration.
General kinematic relationships are given
mathematically
by:
Instantaneous velocity
slope of position graph
Instantaneous acceleration
slope of velocity graph
Final position
Final velocity
v
f
s
5
v
i
s
1
3
t
f
t
i
a
s
dt
5
v
i
s
1
U
area under the acceleration
curve from
t
i
to
t
f
s
f
5
s
i
1
3
t
f
t
i
v
s
dt
5
s
i
1
U
area under the velocity
curve from
t
i
to
t
f
a
s
5
dv
s
/
dt
5
v
s
5
ds
/
dt
5
Motion with constant acceleration is
uniformly accelerated motion
. The
kinematic equations are:
Uniform motion
is motion with constant
velocity and zero acceleration:
s
f
5
s
i
1
v
s
D
t
v
f
s
2
5
v
i
s
2
1
2
a
s
D
s
s
f
5
s
i
1
v
i
s
D
t
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 Spring '08
 Dick
 Physics, Acceleration, Velocity, velocity graph

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