# IB DP Physics SL Unit 1.3 Vectors and scalars Question Bank paper 1

### Question

A list of four physical quantities is

• acceleration

• energy

• mass

• temperature

How many scalar quantities are in this list?

A 1

B 2

C 3

D 4

Answer/Explanation

Ans: C

Examples of scalar quantities

• temperature â€“ eg 10 degrees Celsius (Â°C)
• mass â€“ eg 5 kilograms (kg)
• energy â€“ eg 2,000 joules (J)
• distance â€“ eg 19 metres (m)
• speed â€“ eg 8 metres per second (m/s)
• density â€“ eg 1,500 kilograms per metre cubed (kg/m3)

### Question

Which lists one scalar and two vector quantities?

1. Mass, momentum, potential difference

2. Mass, power, velocity

3. Power, intensity, velocity

4. Power, momentum, velocity

Answer/Explanation

Ans: D

Examples of vector quantities
Some examples of vector quantities include:

force â€“ eg 20 newtons (N) to the left
weight â€“ eg 600 newtons (N) downwards
displacement â€“ eg 50 kilometres (km) east
velocity â€“ eg 11 metres per second (m/s) upwards
acceleration â€“ eg 9.8 metres per second squared (m/s2) downwards
momentum â€“ eg 250 kilogram metres per second (kg m/s) south west