UNIT VII ENERGY: WS 1 Qualitative Analysis - Pie Charts

Unit 0, Introduction to Physics Name______Worksheet 3, More Energy Bar Graphs Date______Period______

Use bar graphs to analyze the energy changes in each situation given. • Designate your choice of system with a dotted line. Choose your system so that all energies involved are within the system. List the objects included in your system in the space provided • Make a list of the changes that occur within your system and whether they increase or decrease on the left side of the T-chart. • Make a list of the appropriate energy accounts that change on the right side of the T-chart. • Construct bar graphs for the wind-up toy for each instant in time shown in the situation. A 1. A ball is held above the ground, and then is dropped so it falls straight down. (Restrict your analysis to the ball being in the air, BEFORE it hits the ground.)

A System: B What changes? Which account? B

2. A wind-up toy is wound up, then "walks" across a table and comes to a stop. A B C

System: What changes? Which account? A B C

3. A truck is driven down the street . A B C

System: What changes? Which A B C account?

Modeling Workshop Project 2012/STL Group, J. Adams, G. de la Paz,, R. Laux, R. Rice 1 Unit 0, WS 3, Introduction to Physics, v3.12 4. A baseball is thrown up in the air and then falls back down. Place that represent the speed and direction of the ball’s motion beside each corresponding baseball in the drawing. Draw a bar graph for each position.

System: C What changes? Which account?

5. A superball is dropped and bounces up and down. Draw a bar graph for each position of the ball shown. Why does the ball not bounce as high each time? Where did the energy "go"? System: A C What changes? Which account? E

A B C D E

6. A ball rolls to a stop on the floor. A B C

System: What changes? Which A B C account?

7. A rock rests on a compressed coiled spring, and is then launched upwards. Modeling Workshop Project 2012/STL Group, J. Adams, G. de la Paz,, R. Laux, R. Rice 2 Unit 0, WS 3, Introduction to Physics, v3.12 System: C What changes? Which account? C

8. A piece of clay is dropped to the floor.

System: A What changes? Which A account?

Modeling Workshop Project 2012/STL Group, J. Adams, G. de la Paz,, R. Laux, R. Rice 3 Unit 0, WS 3, Introduction to Physics, v3.12