discussion | summary | practice | problems |

## newton’s third law practice

### practice problem 1

Suppose everyone in China was to jump in the air simultaneously. Estimate the following quantities to the nearest order of magnitude…

- the acceleration of the Earth
- the initial velocity of the Earth
- the maximum displacement of the Earth

#### solution

Answer it.

### practice problem 2

The smart-assed horse problem.

#### solution

Answer it.

### practice problem 3

Write something different.

#### solution

Answer it.

### practice problem 4

Write something completely different.

#### solution

Answer it.