- #1

- 85

- 0

all i know is K+U = 0 i have no clue how to do this

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter ohheytai
- Start date

- #1

- 85

- 0

all i know is K+U = 0 i have no clue how to do this

- #2

cepheid

Staff Emeritus

Science Advisor

Gold Member

- 5,192

- 38

In practice, you can take "at infinity" to mean "at a sufficiently large distance away."Therefore, if the initial kinetic energy is higher than this critical value, the object will actually come away with excess speed. In other words, if the depth of the potential well is equal to 1/2 * m * (22 m/s)^2 (so that this is the amount of energy that gets "used up" in escaping), and the object actually starts out with 1/2 *m * (30 m/s)^2, then how much excess energy (beyond that needed to escape) will the object come away with? Therefore, how much extra speed?

Share:

- Replies
- 1

- Views
- 10K