Name______Date______Pressure Problems

1.Calculate the pressure on a man’s foot when a woman who weighs 130 lb steps on his foot with her heel, which has an area of 0.5 in2with all her weight.

2.Calculate the pressure exerted on the floor when an elephant that weighs 6000 lb stands on one foot that has an area of 20 in2.

3.Calculate the pressure exerted on the heel of a boy’s foot if the boy weighs 80 N and he lands on one heel which has an area of 0.0016 m2.

4.How much must a woman weigh (force) if the pressure she exerts while standing on one foot which has an area of 30 in2exerts a pressure of 4 lb/ in2?.

5. What is the area of a car tire that touches the road if the car’s weight on that tire is 1000 lbs and the pressure exerted on the road is 12 lb/in2?

6. A box has a weight of 120 lbs and the bottom of the box has a length of 3 inches and a width of 4 inches. What pressure does the box exert on the floor?

7. A bronze statue weighs 2400 Newtons and has a base that is 4 meters by 1 meter. What is the pressure the statue exerts on the floor?

8. The base of a box is 12 inches by 10 inches. It weighs 360 pounds. What is the pressure exerted on the floor by the box?

9. What is the weight of an object that has a base which is 3 square inches and which exerts a pressure of 21 pounds per square inch?

10. What does a car weigh if its tires cover a total area of 4 square feet and each tire exerts a pressure of 1000 pounds per square foot on the ground?

11. To pop a balloon you stab it with a pencil. If the area of the pencil tip is .001in2 and the pressure applied by the pencil to the balloon is 10 lbs/ in2 , how hard (what force) must you push on the pencil to make the balloon pop?

12. A round tube weighs 30 lbs. If the tube is stood on end it pushes down on the floor with a pressure of 2 lbs/in2. How many square inches is the end of the tube?

13. The pressure a box pushes down on the floor is 50 lbs / in2. If the box weighs 400 lbs what is the area of the base of the box?

14. A box that is 2in x 2in x 2in size would need to weigh how much in order to create a pressure of 32lbs/in2 on the floor.

15. If the inside of a container has a surface area of 20 in2, what will be the pressure on each square inch of the container if 117.6 pounds of force are applied to the container?

16. A woman walking in high heals can damage a hardwood floor by making small dimples in the floor since her weight is concentrated on such a small area (the tip of the high heal). If the woman weighs 100 lbs and the tips of the high heal is 1/15 in2 what is the pressure exerted on the floor by her high heal?

Questions

  1. How does a pressure cooker work?
  1. A ladder might help you to rescue someone from an icy pond how?
  1. How do snowshoes work?
  1. Does water have to be hot for it to boil? Explain.
  1. It hurts to carry a heavy package by its string because?
  1. Why is it a bad idea to heat a sealed container of gas?
  1. What happens to a helium balloon as is rises through the atmosphere?
  1. Why doesn’t the air above us crush us?
  1. As you climb a mountain pressure______
  2. As you scuba dive deeper pressure______
  3. For a fixed volume, if temperature increases pressure ______
  4. For a fixed volume, if temperature decreases pressure ______
  5. At constant temperature, if volume increases pressure ______
  6. At constant temperature, if volume decreases pressure ______
  7. At constant pressure, if temperature increases pressure ______
  8. At constant pressure, if temperature decreases pressure ______
  9. For a constant force, decreasing the surface area results in pressure______
  10. For a constant force, increasing the surface area results in pressure______
  11. For a constant area, increasing force results in pressure______
  12. For a constant area, decreasing force results in pressure______
  13. As the speed of a moving fluid increases the pressure______
  14. As the speed of a moving fluid decreases the pressure______

Explain the joke:Einstein, Newton and Pascal are playing hide and go seek. lt’s Einstein’s turn to count so he covers his eyes and starts counting to ten. Pascal runs off and hides. Newton draws a one-meter by one-meter square on the ground in front of Einstein then stands in the middle of it. Einstein reaches ten and uncovers his eyes. He sees Newton immediately and exclaims “Newton! I found you! You’re it!” Newton smiles and says “You didn’t find me, you found a Newton in a square meter. You found Pascal!”