2. Draw a force diagram for the object below.
The box is raised at constant speed.

3. For 100 points FT Fg

4. Draw a force diagram for the object below.
The box moves to the left at constant speed.

5. For 500 points FN FA Fk Fg

6. Draw a force diagram for the object below.
A small child slides down a frictionless slide.

7. For 300 points FN FY Fg FX

8. Draw a force diagram for the object below.
A skydiver falls at constant velocity (include air resistance)

9. For 1000 points Fk Fg

10. A block of dry ice resting on a table is given a brief push
A block of dry ice resting on a table is given a brief push. A moment later, what forces are acting on the block?

11. For 2500 points
Normal force and the force of gravity

12. A block of dry ice resting on a table is given a brief push
A block of dry ice resting on a table is given a brief push. Describe the motion of the block.

13. For 400 points
The block moves at a constant speed.

14. What forces are acting on the block (dry ice)?

15. For 100 points
Towing force, normal force, and gravity

16. Describe the motion of the block (dry ice)

17. For points
The block accelerates constantly

18. When the block (dry ice) reaches point B, the string breaks
When the block (dry ice) reaches point B, the string breaks. Describe the motion of the block.

19. For points
The block moves at a constant speed.

20. Eventually, the block reaches the edge of the table
Eventually, the block reaches the edge of the table. After the block leaves the table, what forces act on the block?

21. For 1000 points
The force of gravity

22. As a ball falls, consider one force to be the pull of the earth on the ball. What is the pair to this force?

23. For 100 points
The pull of the ball on the earth

24. A horse exerts a 500 N force on a heavy wagon, causing it to accelerate. What force does the wagon exert on the horse?

25. For 8000 points
500 N force

26. You’re in the back of a friend’s pickup truck when it stalls on a hill
You’re in the back of a friend’s pickup truck when it stalls on a hill. You jump out, get behind the truck and push with all your might (300 N). Still, the truck slowly rolls back down the hill. The force the truck exerts on you is:

27. For 200 points
300 N

28. When you first learned how to roller skate, you may have gotten started by pushing off the wall at the skating rink. Draw a force diagram for yourself as you accelerate. Using agent-object notation, clearly label all the forces acting on you.

29. For 300 points FN (floor pushing up on you) FA
(wall pushing back on you) Fk
Fg (earth pulling down on you)

30. A sign hangs from a boom supported by a cable connected to a wall
A sign hangs from a boom supported by a cable connected to a wall. The cable makes a 30° angle with the boom. Sketch a force diagram for the sign.

31. For 3000 points FT Fy FA Fx Fg

32. The force of tension in the cable is 100 N. Find the mass of the sign.

33. For 400 points
Five kilograms

34. You push your lawnmower (mass = 15 kg) across the lawn at constant speed. To do so, you must exert 120 N of force. The handle makes a 35° angle with the horizontal. What is the x-component of the force you apply?

35. For 500 points
- 98 N

36. You push your lawnmower (mass = 15 kg) across the lawn at constant speed. To do so, you must exert 120 N of force. The handle makes a 35° angle with the horizontal. How does the frictional force compare to the x-component of the force?

37. For 200 points
They are equal in magnitude, but in the opposite direction.

38. You push your lawnmower (mass = 15 kg) across the lawn at constant speed. To do so, you must exert 120 N of force. The handle makes a 35° angle with the horizontal. What is the normal force?

39. For 600 points
219 N

40. A sign hangs from a boom supported by a cable connected to a wall
A sign hangs from a boom supported by a cable connected to a wall. The cable makes a 30° angle with the boom. The force of tension in the cable is 80 N. What is mass of the sign?

41. For 300 points
4 kg