Properties of matter

Class 9 · Physics · 6 questions

Name: ____________________ Date: ____________

Density is defined as:
- A Mass / volume
- B Volume / mass
- C Mass x volume
- D Weight / area
A block has a mass of 200 g and a volume of 50 cm3. What is its density?
- A 10000 g/cm3
- B 0.25 g/cm3
- C 4 g/cm3
- D 150 g/cm3
Pressure is force per unit:
- A Volume
- B Time
- C Length
- D Area
The SI unit of pressure is the:
- A Newton
- B Pascal
- C Joule
- D Watt
Hooke's law states that within the elastic limit, the extension of a spring is proportional to:
- A Its length
- B Its colour
- C Its temperature
- D The applied force
A ship floats because the upthrust on it equals its:
- A Density
- B Volume
- C Weight
- D Speed

Answer key

1. A, 2. C, 3. D, 4. B, 5. D, 6. C

Density = mass / volume.
Density = 200 / 50 = 4 g/cm3.
Pressure = force / area.
One pascal is one newton per square metre.
Within the elastic limit, extension is directly proportional to the applied force.
A floating body is in equilibrium: the upward buoyant force equals its weight.