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 – eg 10 degrees Celsius (°C)
  • mass – eg 5 kilograms (kg)
  • energy – eg 2,000 joules (J)
  • distance – eg 19 metres (m)
  • speed – eg 8 metres per second (m/s)
  • density – 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 – eg 20 newtons (N) to the left
weight – eg 600 newtons (N) downwards
displacement – eg 50 kilometres (km) east
velocity – eg 11 metres per second (m/s) upwards
acceleration – eg 9.8 metres per second squared (m/s2) downwards
momentum – eg 250 kilogram metres per second (kg m/s) south west