1. 7.1 Work
Force (N)
W = F x d
Work (joules)
Distance (m)

2. 7.1 Work
When thinking about work, remember that work is done by forces that cause movement.
If nothing moves (distance is zero), then no work is done.

4. Solving Problems
How much work is done by a person who pulls a cart with a force of 50 newtons if the cart moves 20 meters in the direction of the force?

5. Looking for: Given: Relationships: Solution …work done by person
Solving Problems
Looking for:
…work done by person
Given:
…force = 50 N (forward);
…distance = 20 m
Relationships:
Work = force x distance
Solution
50 N × 20 m = 1,000 joules.