Hooke's law | Science | Quizalize & Oak National Academy

Starter quiz

Complete the statement. The word used to describe the force on an object due to a gravitational field is ...
- 'weight' ✓
A pupil puts different forces on a spring. Starting with the smallest extension, sort the forces into order of the extension they cause.
- 1
  
  ⇔
  
  1.0 N
- 2
  
  ⇔
  
  1.5 N
- 3
  
  ⇔
  
  2.0 N
- 4
  
  ⇔
  
  2.5 N
- 5
  
  ⇔
  
  3.0 N
- 6
  
  ⇔
  
  6.0 N
The figure shows a spring before and after a weight has been added. What is the extension of the spring when the mass is placed on it?
- 0 cm
- 4.0 cm
- 4.5 cm ✓
- 10.5 cm
- 14.5 cm
The photograph shows a pupil measuring the extension of a spring. How could the pupil improve the accuracy of the measurement?
- Use a shorter spring to make the extension shorter.
- Use a longer ruler to reach the spring.
- Use a set square to make sure the measurement is horizontal. ✓
- Move the ruler further from the spring to keep it balanced.
- Use a longer spring to make the extension shorter.
The gravitational field strength on Earth is 10 N/kg. What size mass will have a weight of 1 N?
- 10 kg
- 1 kg
- 1000 g
- 100 g ✓
- 10 g
Why is it important to measure the extension of a spring when masses are taken off as well as being added?
- This will help loosen the spring and make it stretch better.
- The masses may have changed after they were added.
- To help check the accuracy of the measurements. ✓
- So that a wider range of masses can be used.

Exit quiz

Match the key word or phrase to the definition.
- line of best fit
  
  ⇔
  
  Passes between data points on a graph to show the pattern. ✓
- directly proportional
  
  ⇔
  
  When one variable doubles, the other is doubled. ✓
- elastic
  
  ⇔
  
  Returns to its original length when the forces are removed. ✓
- Hooke’s law
  
  ⇔
  
  A description of the behaviour of springs. ✓
Which statement about springs is correct when they are stretched?
- The length doubles for each newton of force.
- The extension increases at random.
- The extension is independent of the force acting.
- The extension increases the same amount for each newton of force. ✓
- All springs stretch the same amount per newton.
What happens to the extension of a spring if the force acting on it is increased from 6 N to 18 N?
- Is is three times smaller.
- It halves.
- It is the same.
- It doubles.
- It triples. ✓
Which of the following describes the line of best fit for a graph where the two variables are directly proportional?
- It is a curve.
- It is a straight line. ✓
- It is a series of lines that connect all the data points exactly.
- It passes close to the origin (0,0).
- It passes through the origin (0,0). ✓
Some pupils add too much force to a spring. For each extra 1 N they then add, the extension increases much more than expected. What will happen to the spring when the force is removed.
- It will spring back to shorter than its original length.
- It will spring back to its original length.
- It will spring back to longer than its original length. ✓
- It will not spring back and stay at the length it has reached.
The graph shows the extension of a spring for different forces acting on it. What is the extension per newton for this spring? Give your answer to two significant figures.
- '0.33 cm' ✓

Worksheet

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Video

Lesson Details

Key learning points

A line of best fit can show the relationship between variables clearly.
The extension of a spring increases the same amount for each equal sized increase in force.
The extension of a spring is directly proportional to the force applied.
A spring is elastic because it returns to its original length when a force is removed.
Hooke's law describes the behaviour of springs.

Common misconception

The line of a graph must go through all of the points.

Get pupils to invent plots to add to a graph showing a line of best fit that include small mistakes in the measurements.

Keywords

Line of best fit - A line of best fit passes between a set of data points on a graph to show the pattern.
Directly proportional - Variables are directly proportional when one is a constant multiple of the other.
Elastic - A spring is elastic when it returns to its original length after forces are removed from it.
Hooke's law - Hooke's law describes the behaviour of a spring when it is stretched.