Ballistic Pendulum
Objective
We are determining the launch speed of a steel ball as well as
the initial velocity of the pendulum after the ball impacts to observe
the conservation of energy and momentum.
Exercise 1: Momentum of the Steel Ball before the Collision
To determine the muzzle velocity of the steel ball under each of the three settings,
we launched the ball down onto the ground and measured the horizontal and vertical
distances. Then we calculated the average momentums for each of the three settings. The
equations used are below. The data table is located following exercise 4.
Calculations:
(
29
s
m
m
s
m
m
h
g
R
v
/
215
.
2
96
.
2
/
81
.
9
98
.
2
2
0
=
=
s
m
m
m
s
m
m
m
s
m
h
h
g
R
h
g
v
0942
.
96
.
005
.
2
81
.
9
2
1
0391
.
96
.
2
81
.
9
2
2
1
2
2
3
2
2
2
3
0
=
+
⋅
⋅
=
∆
+
∆
⋅
=
∆
s
m
kg
s
m
kg
mv
p
i
⋅
=
⋅
=
=
148
.
215
.
2
067
.
0
s
m
kg
s
m
kg
v
m
p
i
⋅
=
=
∆
=
∆
00631
.
0942
.
067
.
0
Exercise 2: Momentum of the Pendulum and Ball after the
Collision
To calculate the momentum of the pendulum, we must determine the initial
velocity of the pendulum after impact. We can do this by measuring the peak angle of the
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 Fall '06
 Cerruti
 Physics, Conservation Of Energy, Energy, Kinetic Energy, Mass, Momentum, Special Relativity, Conservation of Momentum

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