CONSERVATION OF MOMENTUM
PRE-LAB QUESTIONS
1. A billiard ball collides head-on with billiard ball at rest.
a. Sketch a position vs. time graph for each ball,
include position before the collision, once the
collision occurs and after the collision.
Position
After collision B2 momentum from B , then it started to
got
↓
o ecations
,
more
6 &
After collision e, stopped
,
.
collided
-
when they
-
0 2
.
B1 B in
motion
.
Time
O O ! 0 2
b. What can be said about the conservation of
. .
momentum for the collision? Explain your answer.
motion
the collision of ball #1 and bal 2 B which was in
-
During , ,
,
starts
transfered it momentum to Be which ,
was at rest , Be
making
to more in the direction of By before collision.
2. Write down the total momentum for two marbles of
mass, m, both moving at velocity, v . What is the kinetic
energy of the system?
-
Pr Pre
.
+
Mr 2mv
= +Mr =
mr
-
Ev =
Em + Em =
3. When you drop two marbles at once, why doesn’t only
one marble come off the end twice as fast? Write down
, the kinetic energy of one marble with mass m and
velocity 2v and compare this to your answer in
Experiment 1 Post Lab Question 4 to check.
Note: Assume the collisions are perfectly elastic.
-
Because both marbles have the same weight
and speed
,
same
Em zy2
EXPERIMENT 1: CONSERVATION OF MOMENTUM
Data Sheet
Table 1. Collision Data- Moving and Stationary
Marbles
Number of Number of Stationary Number of Marbles
Flicked Marbles Marbles that Leave the Runway
1 4
I
2 3
3
4
2
1 s
2 2 2
Table 2. Collision Data- Moving Marbles
Number of Number of Marbles
Number of Number of Marbles
Marbles on that Leave the
Marbles on Left that Leave the Left
Right Side of Right Side of the
Side of Runway Side of the Runway
Runway Runway
1 1 8 O
&
1 2 ↑
1 3 3 I
1 4 4 I
2 2 2 2
2 3 3 2
Post-Lab Questions
PRE-LAB QUESTIONS
1. A billiard ball collides head-on with billiard ball at rest.
a. Sketch a position vs. time graph for each ball,
include position before the collision, once the
collision occurs and after the collision.
Position
After collision B2 momentum from B , then it started to
got
↓
o ecations
,
more
6 &
After collision e, stopped
,
.
collided
-
when they
-
0 2
.
B1 B in
motion
.
Time
O O ! 0 2
b. What can be said about the conservation of
. .
momentum for the collision? Explain your answer.
motion
the collision of ball #1 and bal 2 B which was in
-
During , ,
,
starts
transfered it momentum to Be which ,
was at rest , Be
making
to more in the direction of By before collision.
2. Write down the total momentum for two marbles of
mass, m, both moving at velocity, v . What is the kinetic
energy of the system?
-
Pr Pre
.
+
Mr 2mv
= +Mr =
mr
-
Ev =
Em + Em =
3. When you drop two marbles at once, why doesn’t only
one marble come off the end twice as fast? Write down
, the kinetic energy of one marble with mass m and
velocity 2v and compare this to your answer in
Experiment 1 Post Lab Question 4 to check.
Note: Assume the collisions are perfectly elastic.
-
Because both marbles have the same weight
and speed
,
same
Em zy2
EXPERIMENT 1: CONSERVATION OF MOMENTUM
Data Sheet
Table 1. Collision Data- Moving and Stationary
Marbles
Number of Number of Stationary Number of Marbles
Flicked Marbles Marbles that Leave the Runway
1 4
I
2 3
3
4
2
1 s
2 2 2
Table 2. Collision Data- Moving Marbles
Number of Number of Marbles
Number of Number of Marbles
Marbles on that Leave the
Marbles on Left that Leave the Left
Right Side of Right Side of the
Side of Runway Side of the Runway
Runway Runway
1 1 8 O
&
1 2 ↑
1 3 3 I
1 4 4 I
2 2 2 2
2 3 3 2
Post-Lab Questions
