Question

You will answer some questions calculating Gravitational Potential Energy.

The formula is Gravitational Potential Energy = Mass X Gravity X Height.

By gravity they mean the acceleration of gravity. That's how fast something speeds up as it falls. It is 9.8 meters per second. So for these problems you always use 9.8 for gravity.

For mass always use kilos. So if something is 500 grams you'll multiply .5 become 500 grams is .5 kilos. That should be review (converting between units).

For height always use meters. So if something is 90 centimeters height you multiply. 0.9 because 90 centimeters is .9 meters.

So if I have a ball that's 9 kilos at a height of 5 meters to find Gravitational Potential Energy (GPE) I multiply

Mass (9) by Gravity (9.8) by height (5). So the GPE is 441 Joules. (GPE is measured in Joules)

Another example.

A ball of 600 grams is at a height of 70 centimeters, what is the GPE.

It's Mass (.6) times height (.7) times gravity (9.8). (((It doesn't matter which order you multiply)))

So the GPE is 4.116 Joules.

The formula looks fancy GPE=mgh

But it's just Mass times 9.8 times Height.

Calculate GPE for these 4 scenarios.

1. An 80 kilo brick at a height of 80 meters.

2. An 8 kilo brick at a height of 8 meters.

3. A 700 gram ball at a height of 8 meters.

4. A 700 gram ball at a height of 80 centimeters.



Had no idea how to do this.. Help please

Answer 1

Answer:

dont know sorry

Explanation: