# 1. Do you think the Skater will make it over the first hump

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1. Do you think the Skater will make it over the first hump
1. Do you think the Skater will make it over the first hump? Explain WHY! (No friction on the track)

2. Do you think the Skater will make it over the first hump
2. Do you think the Skater will make it over the first hump? Explain WHY! (lots of track friction)

3. Do you think the Skater will make it over the first hump
3. Do you think the Skater will make it over the first hump? Explain WHY! (No friction on the track)

4. Do you think the Skater will make it over the first hump
4. Do you think the Skater will make it over the first hump? Explain WHY! (lots of track friction)

5. In the next moment, the KE piece of the pie gets larger, then
The Skater is going up hill (left) The Skater is going down hill (right) There is no way to tell B.

6. In the next moment, the KE piece of the pie gets larger, then
The PE part stays the same The PE part gets larger too The PE part gets smaller There is no way to tell C

7. In the next moment, the KE piece of the pie gets larger, then
The Skater will be going faster The Skater will be going slower There is no way to tell

1. The dotted line on the chart shows the energy of the Skater, where could she be on the track?
The point E is Zero PE The track is saved, but you have to change the skater to the girl. It is the default track, but I used the pause to place her at the very top of the track and moved the track so that she reaches zero PE (nearly)

2. The bar graph shows the energy of the Skater, where could she be on the track?

3. The pie graph shows the energy of the Skater, where could she be on the track?
KE B PE

4. If the ball is at point 4, which chart could represent the ball’s energy?
KE PE A. B. C. D. 2 1 3 4 The track is saved, but you have to select the ball and give it maximum mass to see the pie well. I used the loop track with the ball skater and made it more massive. The answer is C A is at 1 or 3 B is at the lowest point on the track

5. If a heavier ball is at point 4, how would the energy change?
KE No changes The total energy would be larger The PE part would be larger The KE part would be larger PE 2 1 3 4 B Change the ball’s mass to show this

6. As the ball rolls from point 4, the KE bar gets taller
6. As the ball rolls from point 4, the KE bar gets taller. Which way is the ball rolling? At Next step 2 1 3 4 You will need to Zoom out on the bar graph window to see the top of the bars Up (right) Down (left) not enough info

7. The Energy chart of a boy skating looks like this
How would you describe his speed? He is at his maximum speed He is stopped He is going his average speed He is going slow He is going fast A

8. The Energy chart of a boy skating looks like this
How would you describe his speed? He is at his maximum speed He is stopped He is going his average speed He is going slow He is going fast C Have the students predict by drawing the charts for B, D and E then show the next slide

9. Select a letter for each: stopped, slow and fast
B A A slow B stopped C fast

Energy vs Position 10. Sketch this energy position graph. Label where the 5 spots, A-E, could be PE KE He is going his maximum speed He is stopped He is going his average speed He is going slow He is going fast

Roller Coaster Lab What happens to Gravitational Potential Energy throughout the ride? Where is EG the same? What happens to Kinetic Energy throughout the ride? Is EK the same at points of the same height? What happens to Thermal Energy throughout the ride?

The table below lists the mass and speed of each of four objects.
Which two objects have the same kinetic energy? a. A and D c. B and D b. A and C d. B and C

A pendulum is pulled to the side and released from rest
A pendulum is pulled to the side and released from rest. Which graph best represents the relationship between the gravitational potential energy of the pendulum and its displacement from its point of release?

The diagram below shows an ideal simple pendulum.
As the pendulum swings from position A to position B, what happens to its total mechanical energy? [Neglect friction.]

A 6.8-kilogram block is sliding down a horizontal, frictionless surface at a constant speed of 6.0 meters per second. The kinetic energy of the block is approximately

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