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Statics Practice Worksheet

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					Statics Practice Worksheet
Tension problems

1. A window washer stands in the middle of a horizontal board which is supported
by two vertical ropes, one at each end. If the window washer and his equipment
weigh 500 N, and the board weighs 40 N how much tension is in each wire?

2. A rock climber hangs from a rope that makes a 25° angle from a vertical rock
face. He pushes off the rock face horizontally with his feet. If he and his gear
weigh 640 N how much tension is there in the rope and how hard must he push
with his legs?

3. A rock climber hangs from a rope that makes a 15° angle from a vertical rock
face. She pushes off the rock face horizontally with her feet. If she and her gear
weigh 560 N how much tension is there in the rope and how hard must she push
with her legs?

4. A picture weighing 2.40 N hangs from the middle of a wire so that the wire
makes a 35.0° angle from the horizontal. How much tension is in the wire?

5. Another picture, this one weighing 5.30 N hangs from the middle of a wire
making a 20.0° angle from the horizontal. How much tension is in the wire?

Dragging Problems

6. A box weighing 45 N is pulled at a constant velocity by a rope at 25° from the
horizontal. If 12 N of friction opposes the motion, how much tension is in the
rope and how much is the normal force on the box?

7. A box weighing 78 N is pulled at a constant velocity by a rope at 35° from the
horizontal. If 42 N of friction opposes the motion, how much tension is in the
rope and how much is the normal force on the box?

8. A box weighing 67 N is pulled at a constant velocity by a rope at 32° from the
horizontal. If the tension in the rope is 22 N, how much friction opposes the
motion and how much is the normal force on the box?

9 . A box weighing 124 N is pulled at a constant velocity by a rope at 12° from the
horizontal. If the tension in the rope is 76 N, how much friction opposes the
motion and how much is the normal force on the box?
Inclined Plane Problems

10. A box that weighs 54.8 N sits stationary on an inclined plane that makes an
angle of 34.0° with the horizontal. How much static friction opposes the motion
and what is the normal force on the box?

11. A box that weighs 7.8 N sits stationary on an inclined plane that makes an
angle of 25.0° with the horizontal. How much static friction opposes the motion
and what is the normal force on the box?

12. When the Inclined plane in # 10 is raised so that it makes a 45° angle with the
horizontal it slides down with a constant velocity. How much kinetic friction
opposes the motion and what is the normal force on the box?

13. When the Inclined plane in # 11 is raised so that it makes a 42° angle with the
horizontal it slides down with a constant velocity. How much kinetic friction
opposes the motion and what is the normal force on the box?

				
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posted:11/23/2011
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