Systems and energy

1. Describe the difference between an open system and a closed system.

Questions 2 – 5: Ball thrown straight up

2. Write down the equation for the total energy in the system before and after the change in height and speed in the space above.

3. Rewrite this equation eliminating terms that are zero.

4. If the initial velocity is 10 m/s, how high will the ball go?

Questions 6 – 13: Frictionless rollercoaster

5. Write down an equation for the total energy in the system at point 1 and point 2, before and after the change in height and speed.

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Systems and energy

1. Describe the difference between an open system and a closed system.

Questions 2 – 5: Ball thrown straight up

2. Write down the equation for the total energy in the system before and after the change in height and speed in the space above.

3. Rewrite this equation eliminating terms that are zero.

4. If the initial velocity is 10 m/s, how high will the ball go?

Questions 6 – 13: Frictionless rollercoaster

5. Write down an equation for the total energy in the system at point 1 and point 2, before and after the change in height and speed.

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6. Use the tables below to calculate the kinetic energy of the cart at point 2 for the following values: m = 2,000 kg, hi = 30 m, hf = 16 m

7. What is the final speed of the cart (at point 2)?

8. Rewrite the energy conservation equation, eliminating terms that are zero.

9. If the initial height is 30 meters, how fast is the cart moving when the height is 16 meters?

10. Calculate the kinetic energy for the speed you found in question 10. How does this compare to your result in question 8?

11. Use the table below to determine the height at which the speed of the cart is 50 mph (22.4 m/s).

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6. Use the tables below to calculate the kinetic energy of the cart at point 2 for the following values: m = 2,000 kg, hi = 30 m, hf = 16 m

7. What is the final speed of the cart (at point 2)?

8. Rewrite the energy conservation equation, eliminating terms that are zero.

9. If the initial height is 30 meters, how fast is the cart moving when the height is 16 meters?

10. Calculate the kinetic energy for the speed you found in question 10. How does this compare to your result in question 8?

11. Use the table below to determine the height at which the speed of the cart is 50 mph (22.4 m/s).

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