# Rock mechanics?

A rock falls to earth from approximately 10,000m above the ground, starting from rest, without air resistance. What would the slope of the total mechanical energy look like? What would the slope of the kinetic energy look like? (eg. flat, increasing, decreasing, constant)

### 5 Answers

- 4 weeks agoBest Answer
The total mechanical energy would be flat. As the potential energy decreases, the kinetic energy increases, and this keeps the mechanical energy at a constant value.

Kinetic energy would be increasing. The potential energy is turning into kinetic.

- Anonymous4 weeks ago
If no air resistance, energy will be increasing.

- Andrew SmithLv 74 weeks ago
HOW is the rock going to fall from 10000 m above the ground. Where is the rock right now?

There is nowhere for the rock to BE such that it falls this distance.

However without air resistance there is no loss of mechanical energy so the total mechanical energy is a constant ( straight horizontal line).

The graph of kinetic energy would be increasing and of potential energy decreasing.

The sum of the two is the total mechanical energy which is not changing.

The shape of the graph depends on whether you plot energy against TIME or energy against DISTANCE FALLEN.

- zenoLv 64 weeks ago
The fall would be constant as with everything

Related to gravity but the size of the rock or

Asteroid could cause a huge blast of dirt with

Toxic material like the one the covered the earth

And killed all the dinosaurs. I'm not exactly

Sure how energy builds into that hyper blast

Of atomic size or how big the rock or asteroid

Was that wiped out our dinosaurs.

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- oubaasLv 74 weeks ago
What would the slope of the total mechanical energy look like?

flat (conservation of energy)

What would the slope of the kinetic energy look like?

increasing Vs time (GPE becomes KE)