Speed 

In this topic we will build on key knowledge learnt on forces and their effects on objects. We will investigate how forces can change an object's speed whilst linking key understanding of mathematical calculations to explain the changes.

Task 2c: Make notes that:

• Identify what forces can do to an object. 

• Describe what happens when the forces are unbalanced.

• Define resultant force.

• Calculate resultant forces.

• Explain how resultant force affects speed. 

Task 3b: Make notes that:

• Define speed.

• Explain how we can calculate speed.

• Expain how to convert units:

  1. from km to m

  2. from m to km

  3. from minutes into seconds

  4. from seconds into minutes

Task 4b: Make notes that:

• Explain how to calculate speed using a formula.

• Explain how to calculate speed using distance-time graphs.

• Describe the motion of an object when:

  • The graph is flat

  • The graph is getting higher

  • The graph is getting lower

Task 5c: Make notes that:

• Describe how the speed of an object varies when measured by observers who are:

  1.  Not moving 

  2. Moving away from the object.

• Define relative motion.

• Suggest how the motion of two objects moving at different speeds in the same direction would appear to eachother.

Task 6b: Make notes that:

• Give the formula used to calculate speed.

• Plan a practical to investigate how the speed of a trolley changes as it rolls down a ramp.

• Explain how to predict changes in an object’s speed when the forces acting on it changes. 

Task 6c: Complete the exam questions

Task 8: Complete end of unit quiz