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Roller Coaster Lab
Objective:Compare & contrast the kinetic energy (KE) & potenetial energy (GPE)of a rollercoaster.
Predict where the marble Predict where the marble will have the greatest GPE will have the greatest GPE & KE.& KE.
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Proceduresa) Set up rollercoaster ramps &
photogate timers.
b) Measure height, mass, & velocity of the marble at 7 different positions.
c) Record Data in Table.
d) Graph data.
e) Write a conclusion.
DATA TABLE #1
How do you calculate GPE?
Measure: mass in Kg,
Gravity (9.8 m/s2
& height in m.
Don’t forget to convert grams to kilograms
& cm to meters.
Data Table #2 How do measure KE?
Measure: mass in Kg, & velocity in m/s.Don’t forget to convert grams to
kilograms& cm to meters.You also must ½ the mass &square the velocity
Graph Position Vs KE & GPE
Position is the ______________ variable; therefore goes on the _______ axis.
Energy is the ______________ variable; therefore goes on the _______ axis.
Draw a “ line of best fit” for both graphs use 1 sheet of graph paper.
Title your graph.(also write your name on the paper)
• Label the X &Y axis.
• Scale the X & Y axis
• Mark your data on the same graph
• Draw a best fit line.
• Color the lines KE in yellow & GPE in green
• Write a conclusion.
• Describe any sources of error.
DATA TABLE#1 GPEposition mass
(kg) gravity(m/s2)
height (m)
GPE (J)
1> 0 cm
2>23cm
3>43cm
4>63cm
5>83cm
6>103cm
7>128cm
Data Table #2 KE
Position 1/2m (kg)
D
(m)
T
(s)
V
(m/s)
(V)2
(m2 /s2 )1- 0 cm
2-23cm
3-43cm
4-63cm
5-83cm
6-103cm
7-128cm
Kinetic energy