# Science

posted by .

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point?

• Science -

Assuming energy is conserved, gravitational potential energy and kinetic energy 'swap' during a fall, and the numeric values transfer. I would say the answer is 180 - 135 = 45J
Kinetic energy = 45J

## Similar Questions

1. ### Science

Wil kinetic energy increase or decrease based on the amount of potential energy it starts with?
2. ### Physics

I need help with b... I found that k=.750880 for part a but I can't figure out what y would be to get potential energy. A 52 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) …
3. ### Science

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point?

1. The thermal energy of an object is _____. (1 point) its potential energy its average kinetic energy its potential energy minus its kinetic energy its kinetic energy plus its potential energy Thanks, jessica :)
5. ### physics

A. A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 6 J and its initial kinetic energy is 78 J, what is its total energy, E?
6. ### Science

Classify each of the following as examples of kinetic or potential energy. a) a car driving along a level road. b) an elastic band is stretched to twice its normal length c) a book is at rest on the top shelf of a bookcase d) a lightning …
7. ### physics

A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 85 J and its initial kinetic energy is 83 J, what is its total energy, E?
8. ### science

A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor?
9. ### science

A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor?
10. ### Science (energy)

1. What similarities do nuclear energy and chemical energy share?

More Similar Questions