DO SPEED AND MASS AFFECT KINETIC ENERGY?
Materials: Ruler
Hot wheels car
Track
Ramp
2 film cans filled with sand
I. KINETIC ENERGY AND SPEED
1. Place a film canister on its side towards the bottom of the track.
2. Place the car 30cm above the canister on the ramp and release it.
3. What happened to the film canister? _______________________________________
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4. What kind of energy caused this to happen? _________________________________
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5. Measure how far the film canister slid.
6. Repeat step 2 and average the results on the back
7. Now place the car 60cm above the film canister and release it.
8. What do you predict will happen? _________________________________________
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9. Repeat step 6 and average the results on the back.
10. The car is rolling a longer distance down hill. What effect does this have on its speed?
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11. What can you conclude about the relationship between kinetic energy and speed?
HINT: KE = ? mv2
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II. KINETIC ENERGY AND MASS
1. You are now going to test the effect of increasing mass is on kinetic energy. Repeat the steps from the previous page but this time tape one of the film canisters to the roof of the car.
2. The mass of the car without the film canister is about 40 grams.
3. What is the mass of the car with the film canister taped on.________________ grams
4. Roll the car down the ramp as you did in step 6 from the previous page.
5. Measure how far the film canister slid
6. What do you predict will happen? _________________________________________
_____________________________________________________________________
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7. Repeat and record your results below.
8. What can you conclude about the relationship between kinetic energy and mass? _______________________________________________________________________________________________________________________________________________________________________________________________________________
9. Which test had the most energy? HINT: KE = ? mv 2 A) Rolled 30 cm B) Rolled 60cm C) Rolled 60cm with taped on film canister
HINT: KE = ? mv 2
Explain: _____________________________________________________________
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30 cm Slide
Trial 1 ________ cm
Trial 2 ________ cm
Trial 3 ________ cm
Total ________ cm
Avg. ________ cm
60 cm Slide
Trial 1 ________ cm
Trial 2 ________ cm
Trial 3 ________ cm
Total ________ cm
Avg. ________ cm
60 cm Slide (film can)
Trial 1 ________ cm
Trial 2 ________ cm
Trial 3 ________ cm
Total ________ cm
Avg. ________ cm