1. How much tension is there in a rope that holds a 20-N bag of apples at rest? 15. What does ΣF = 0 mean? 2. Why is the support force on an object often called the normal force? 3. When you weigh...

1. How much tension is there in a rope that holds a 20-N bag of apples at rest? 15. What does


ΣF = 0 mean?

2. Why is the support force on an object often called the normal force?

3. When you weigh yourself, how does the support force of the scale acting on you compare with the gravitational force between you and Earth?