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Year 7 · Science · Forces · Lesson 3

Speed

Calculating speed, distance and time using speed = distance ÷ time, and reading distance-time graphs.

Whiteboard video lesson: Speed

17-minute video lesson

Teaching, worked examples and 20 practice questions solved step by step.

Watch free for a month

What your child will learn

  • Calculate speed
  • Rearrange to find distance and time
  • Use correct units
  • Interpret distance-time graphs

The method

  1. Formula.
  2. Units.
  3. Substitute.
  4. Answer + units.

Key words: speed, distance, time, metres per second, distance-time graph, stationary.

Worked examples

The first three practice questions from the lesson, with every step.

Question 1

Write the formula for speed.

  1. Step 1: d ÷ t

Answer: speed = distance ÷ time

Question 2

What is the unit of speed in science?

  1. Step 1: m/s

Answer: metres per second (m/s)

Question 3

Speed: 60 m in 10 s?

  1. Step 1: 60 ÷ 10

Answer: 6 m/s