Equation Sheet, Exam 2
VECTORS:
A
x
=
Acos
(
θ
),
A
y
=
Asin
(
θ
), and
A
= (
A
2
x
+
A
2
y
)
1
/
2
, and
tan
(
θ
) =
A
y
A
x
.
KINEMATICS:
x
f
=
x
i
+
v
xi
t
+
1
2
a
x
t
2
,
v
xf
=
v
xi
+
a
x
t
,
v
2
xf
=
v
2
xi
+ 2
a
x
(
x
f
-
x
i
),
x
f
=
x
i
+
1
2
(
v
xi
+
v
xf
)
t
,
NEWTON’S LAWS:
∑
F
=
m
a
,
F
12
=
-
F
21
,
FRICTION:
f
k
=
μ
k
F
N
f
s
≤
μ
s
F
N
WORK:
W
=
F
·
d
=
Fdcos
(
θ
) =
R
F
·
d
l
ENERGY:
W
s
=
U
s
=
1
2
kx
2
s
K
=
1
2
mv
2
GRAVITATION:
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- Spring '08
- DEMAREE
- Physics, Force, Mass, Standard gravity, xf − xi, ax t2
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