Forces
Practice
practice problem 1
Draw a free body diagram of…
- a book lying on a level table.
- a person floating in still water.
- a wrecking ball hanging vertically from a cable.
- a helicopter hovering in place.
solution
In all four cases, the downward pull of gravity is balanced by an upward force. There are no significant lateral (side-to-side) forces in these examples. Read the discussion section of this topic for a more detailed explanation.
 |
 |
 |
 |
practice problem 2
Draw a free body diagram of a child pushing a wagon on level ground.
solution
The solution to this problem depends on the direction of the acceleration of the wagon. Read the discussion section of this topic for a more detailed explanation.
practice problem 3
Write something different.
solution
Answer it.
practice problem 4
Write something completely different.
solution
Answer it.