1. Roller Coaster Lab

2. Predict where the marble will have the greatest GPE & KE.
Objective:Compare & contrast the kinetic energy (KE) & potenetial energy (GPE)of a rollercoaster.
Predict where the marble will have the greatest GPE & KE.

3. Procedures a) 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.

4. 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.

5. 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

6. 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.

7. 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.

8. DATA TABLE#1 GPE position mass (kg) gravity(m/s2) height (m) GPE (J)
1> 0 cm
2>23cm
3>43cm
4>63cm
5>83cm
6>103cm
7>128cm

9. Data Table #2 KE Kinetic energy Position 1/2m (kg) D (m) T (s) V (m/s)
1- 0 cm
2-23cm
3-43cm
4-63cm
5-83cm
6-103cm
7-128cm