| A | B |
|---|
| friction | force when two surfaces rub together |
| gravity | force that pulls things to the ground |
| streamlined | shaped to cut move quickly through the air |
| air resistance | force that pushes against things moving through the air |
| upthrust | upwards force in water |
| Newton | units used to measure forces |
| forcemeter | device used to measure size of forces |
| arrow | this is used to show forces on diagrams |
| balanced | when forces are the same size they are .. |
| unbalanced | if one force is bigger than the other they are.. |
