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Physical Science Worksheet: Pressure

Short Answer

1. You have been accepted into a boat building competition. You get to pick between two boat plans. Boat A’s plans has the dimensions of 10m wide and 85m long and exerts 2200Pa of pressure. Boat B’s plans has the dimensions of 3m wide and 173m long and exerts 3100Pa of pressure. In order for the boat to float, the force applied to the water must not exceed 2.0x106N. Would you pick Plan A or Plan B?

2. If you are standing on one foot and then put both feet down, you have ____ the force on the ground.

3. If you are standing on both feet and then stand on one foot, you have ____ the pressure on the ground.

4. 50 mL of soda in a soda can exerts ____ 50 mL of soda in a 1L bottle.

5. According to Archimedes, the buoyant force on an object is equal to ____.

6. As the speed of a fluid increases, ____.

7. Snowshoes enable a person to walk on deep snow because the snowshoes

8. A unit of pressure is called a

9. Air pressure decreases as

10. Water pressure increases as

11. A ship stays afloat as long as the buoyant force is

12. A raft is floating on the water. The bottom of the raft takes up an area of 22m2. It exerts a force of 847N onto the water. How much pressure did the raft push on the water?

13. A jack hammer exerts 6000 Pa of pressure onto the concrete. The tip only covers an area of 0.04m2. How much force does the jack hammer apply to the concrete?

14. You have been accepted into a boat building competition. You get to pick between two boat plans. Boat A’s plans has the dimensions of 45m wide and 126m long and exerts 2300Pa of pressure. Boat B’s plans has the dimensions of 6m wide and 115m long and exerts 2700Pa of pressure. In order for the boat to float, the force applied to the water must not exceed 2.0x106N. Would you pick Plan A or Plan B?

15. You have been accepted into a boat building competition. You get to pick between two boat plans. Boat A’s plans has the dimensions of 9m wide and 106m long and exerts 2000Pa of pressure. Boat B’s plans has the dimensions of 135m wide and 54m long and exerts 2800Pa of pressure. In order for the boat to float, the force applied to the water must not exceed 2.0x106N. Would you pick Plan A or Plan B?

16. You have been accepted into a boat building competition. You get to pick between two boat plans. Boat A’s plans has the dimensions of 63m wide and 75m long and exerts 1800Pa of pressure. Boat B’s plans has the dimensions of 127m wide and 63m long and exerts 3100Pa of pressure. In order for the boat to float, the force applied to the water must not exceed 2.0x106N. Would you pick Plan A or Plan B?

17. The mass per unit volume of a substance is its

18. Fluid pressure is the total force exerted by the fluid divided by

19. The pascal is equal to ____________________ of force applied over and area of ____________________.

20. A force of 20 N exerted over an area of 0.5 m2 exerts what pressure?

21. Air passing over an airplane's wing travels ____________________, and therefore exerts ____________________ pressure, than air traveling beneath the wing.

22. A 30-kg box is 0.2 m long and 0.15 m wide. What pressure does it exert on the floor?

23. Explain how you can drink from a straw.

24. Salt water is more dense than fresh water. A barge that is barely floating in the Gulf of Mexico sinks when it goes into the Mississippi River. Why?

25. If an object sinks in a fluid, the buoyant force is ____ the weight of the object.

Physical Science Worksheet: Pressure

Answer Section

SHORT ANSWER

1. either, both will float

2. not changed

3. increased

4. more pressure than

5. the weight of the fluid displaced

6. the pressure decreases

7. increase the area over which the person’s weight is distributed.

8. pascal.

9. elevation increases.

10. depth increases.

11. greater than the ship’s weight.

12. 38.5 Pa

13. 240 N

14. B

15. A

16. neither, both will sink

17. density.

18. the area over which the force is exerted.

19. one newton, one square meter

20. 40 Pa

21. faster, less

22. 9800 Pa

23. You suck air out of the straw, lowering the pressure inside of the straw. The pressure inside the straw is less than the atmospheric pressure pushing down on the liquid outside the straw, so liquid is pushed up in the straw.

24. The density of the barge is just equal to that of the salt water in the Gulf Mexico. Its density is greater than that of the fresh water in the Mississippi River, so it sinks.

25. less than

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