Pressure

Topic: Pressure
Name:________________________________________________________________

1. A 60 kg lady walks along beach; her feet´s area is 0.392 m2. If she wares high hills the contact areais 0.0052 m2. Find the pressure over the sand. A) No wearing shoes. B) Wearing shoes.
2. A kid pushes a nail on the wall applying a force of 50 N. Find the pressure on the nail on the wall if itscontact area is 0.1 mm2
3. A 50.0-Kg ballet dancer stands on her toes during a performance with 4 in2 in contact with the floor. What is the pressure exerted by the floor over the area of contactif the dancer is stationary?
4. Find the pressure that a 45 kg kid exerts on the ground when he walks if the shoes’ contact area is 300 cm.
5. If the same kids is wearing skis (1.5m long and 10cm wide), find the pressure exerted on the shoe.
6. A 6610 kg tractor has a contact area of 1.4 m2. Find the pressure on the ground.
7. Estimate the pressure exerted on the floor by (a) a 50kg model standing on a single spiked heel ( area = 0.05 m2) and compare it (b) to the pressure exerted by a 1500 kg elephant standing on one feet 2 ( area = 800 cm2),
8. A 70.0-Kg man in a 5.0Kg chair tilts back so that all the weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 1.0 cm, and find the pressureexerted by each leg on the floor.
9. The four tires of an automobile are inflated to a gauge pressure of 2.0 x 105 Pa. Each tire has an area of 0.024m2 in contact with the ground. Determine theweight of the car.
10. Calculate the total force of the atmosphere acting on the top of a table that measures 1.6 x 1.9 m.
11. The gauge pressure in each of the four tires of an automobile is 240kpa. If each tire has a footprint of 200 cm 2 estimate the mass of the car.
12. Find the hydrostatic pressure at the bottom of a tank full of oil. The liquid column is 10m and its density is...