Mech And Photoelectric Energy Bar Charts
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1
2Name: _____________________________
Relating Mechanical Energy to the Photoelectric Effect
Draw the energy bar charts for the system when Ball 1 is located in 3 different positions, designated on the diagram
as A, B, and C. To simplify the bar charts and relate them to the photoelectric effect we will make the following
assumptions: friction is negligible, the mass of Ball 1 is equal to Ball 2, and the collision between Ball 1 and 2 is
perfectly elastic.
C
B
A
Ball 2
h = 0m
For each scenario the system will include Ball 1, Ball 2, and the Earth. The Initial velocity of Ball 1 and Ball 2 is 0 m/s.
The dotted line on each chart corresponds to the minimum gravitational energy necessary for Ball 2 to exit the ramp.
Show the relative energies of Ball 1 and Ball 2 on the initial and final energy bar charts.
Final Energy
Initial Energy
(Ball 2 v
= 0 m/s)
f
Position A
E
E
E
E
E
E
E
E
K1
g1
g2
K2
g1
K1
g2
K2
Final Energy
Initial Energy
(Exiting Ramp)
Position B
E
E
E
E
E
E
E
E
g1
K1
g2
K2
g1
K1
g2
K2
Final Energy
Initial Energy
(Exiting Ramp)
Position C
E
E
E
E
E
E
E
E
g1
K1
g2
K2
g1
K1
g2
K2
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