1. Equilibrium & Tension

2. Spring Scale
Magnitude of downward force exerted by string on scale = 9 N
Magnitude of upward force on scale by hook = 9 N
Note that spring scale reads 9 N

3. Tension
Tension: Stretching Force
Spring Scale reads?
10 N
10 N

4. Equilibrium
What happens to the upward forces as the painter moves closer to the left?

5. Tension The rope supports a lantern that weighs 50 N.
Is the tension in the rope less then, equal to, or more than 50 N? Defend your answer.

6. Tension
The rope is repositioned as shown, and still supports the 50-N lantern.
Is the tension in the rope less then, equal to, or more than 50 N? Defend your answer.

7. Tension
If the painter weighs 60 N, what is the tension in the rope in each case?

8. Single Pulley
What is the limit to W?
Brick layer’s Tale

9. Burl the Painter
600
1200
800
1200

10. Burl
500
830

11. 600
600
350 19

12. More Equilibrium
1000
500
500
500
1000
500

13. Plane Forces
Which is bigger? Thrust or Drag?