| Normally, the hull stays down in the water, with the frictional drag greatly limiting the speed of the boat. |
| Many systems, located on different parts of the body, involve surfaces with particular frictional properties. |
| This denser atmosphere means that the frictional force is greater, so its slows down more quickly, so the orbit decays more quickly. |
| The direction of the frictional force always opposes the direction of motion. |
| Air resistance is a type of frictional force and it is worth considering some general points about friction first. |
| This is a result of a decrease in frictional drag due to removal of body hair. |
