Dynamometer and pressure
Answers are for parents and teachers.
1
A force of 800 N presses on 4 m². Pressure in Pa?
200
2
Pressure 500 Pa, area 6 m². Force in N?
3000
3
How many Pa is 5 kPa?
5000
4
Find one home example of reducing pressure and one of increasing it.
Reducing: a wide mat under a pot; increasing: a knife, a needle.
5
Which side of a 1 kg book gives the smallest pressure when it lies on a desk? Explain.
The largest (flat) face, because a larger area gives smaller pressure.