Objective: To learn why circular motion is an accelerated motion and needs a centripetal force. Lesson Outcomes Core: Recall that circular motion is a system that is always accelerating Challenge: Understand that circular motion requires a force that acts towards the centre of motion Aspire: Analyse different areas systems to show the relationship between the different components of the circular motion equation.

Lesson Objective To learn about forces, the work that they do and how to measure it. Lesson Outcomes Core level 4: State that energy is measured in joules (J). Calculate the work done by a force. Measure the work done by a force experimentally. Challenge level 6: Describe the action of frictional forces on objects and the associated heating effect. Use the equation for work done to calculate distances or size of forces. Use repeat values to measure the work done by a force experimentally. Aspire Level 8: Use the principle of conservation of energy and forces to explain why objects become heated by frictional forces. Apply the equation for work done in a wide range of contexts. Evaluate in detail an experiment to measure work done, explaining why there is variation in the measurements.

Core: level 4 Identify circuit components from their symbols. Draw and interpret simple circuit diagrams. Construct a simple electrical circuit. Challenge: level 6 Describe the operation of a variable resistor and a diode and their effects on current. Calculate the charge transferred by a steady current in a given time. Construct an electrical circuit and accurately measure the current. Aspire: level 8 Explain the nature of an electric current in wires in terms of electron behaviour. Perform a range of calculations, including rearrangement of the equation Q = It. Measure the current in a circuit accurately and use it to calculate the rate of flow of electrons.