Pressure Questions

Question 1

A drawing pin is pushed with a force of 50N into an area of 25cm². What is the pressure?

Answer 1

2N/cm²

Question 2

The pressure of a box on a table is 10N/cm²
The area of the side of the box is 20 cm² what is the force exerted by the box

Answer 2

200 N

Question 3

The pressure exerted by an object is 20N/m². The force is 100N what is the area of the object

Answer 3

5m²

Question 4

Two people A & B weigh the same - 50kg. A’s feet have a total surface area of 350cm² and B’S feet have a total surface area of 375cm². Which person exerts the most pressure on the ground and why?

Answer 4

A as the same weight is spread across a smaller surface area.

Question 5

What is the pressure exerted by an object with a surface area of 2cm² and a force of 7N.

Answer 5

3.5N/cm²

Question 6

Does water pressure increase or decrease as you go deeper?

Answer 6

Increases

Question 7

What is pressure measured in?

Answer 7

N/M²

Question 8

Why does a dam need a thick base?

Answer 8

The water pressure is greatest at the base

Question 9

Calculate the pressure at the bottom of Lough Neagh
Depth 25m
Density 1000kg/m³

Answer 9

=1000x10x25
=250000N/m²