For these questions, assume that g = 10 N/kg

1. Which of the following formulas is used to calculate the pressure produced by a force?

  • A) pressure = force ÷ area
  • B) pressure = force x area
  • C) pressure = force ÷ volume
  • D) pressure = force x volume

2. The air in a tractor tyre produces a large force on the tyre. What pressure produces a force of 8 kN acting on 0.2 m2?

  • A) 40 Pa
  • B) 16 Pa
  • C) 40 000 Pa
  • D) 1600 Pa

3. A block of weight 6 N rests on a desk as shown.

block on table

  

3. What pressure does the block above cause on the desk?

  • A) 300 Pa
  • B) 30 Pa
  • C) 1.2 Pa
  • D) 0.12 Pa

4. A cube of wood is pushed under water. The average pressure of the water is 20 N/cm2, and the force on one side of the cube is 200 N.
What is the area of one side of the cube?

  • A) 10 cm2
  • B) 0.1 cm2
  • C) 400 cm2
  • D) 4000 cm2

5. A fizzy drink in a bottle is under a pressure. In which direction does this pressure act?

  • A) Upwards, on the top of the bottle.
  • B) Sideways, on the sides of the bottle.
  • C) Inwards, squeezing the particles together.
  • D) In all directions.

6. A nail is hammered into wood with a large force. Which of the following answers best decribes the surface area and the pressure at the end of the nail touching the wood as it is hammered?

 Surface area Pressure
A
 small small
B
 small large
C
 large small
D
 large large

7. Which of the following statements about the pressure in a liquid is correct?

  • A) The pressure is higher in a dense liquid at large depths.
  • B) The pressure is higher in a dense liquid near the surface.
  • C) The pressure is higher in a liquid of low density, near the surface.
  • D) The pressure is higher in a liquid of low density at large depths.

8+9. The table below shows the pressure at different depths as a diver descends into a fresh water lake. What are the missing values in the table?
(Density of water= 1000 kg/m3).

 

 Pressure due to liquid Depth
8. 500 000 Pa
9. 250cm
 

10. Which of these statements best describes the change in atmospheric pressure that takes place as you climb a high mountain?

  • A) The pressure increases as the height of the column of air above us decreases.
  • B) The pressure decreases as the height of the column of air above us decreases.
  • C) The pressure increases as the height of the column of air below us decreases.
  • D) The pressure decreases as the height of the column of air below us decreases.