OCR GCSE Physics A Topic 2 REVISION (Forces)

This is an engaging REVISION lesson which is fully-resourced and uses a range of exam questions, understanding checks, quick tasks and quiz competitions to enable students to assess their understanding of the content within topic 2 (Forces) of the OCR GCSE Physics A 9-1 specification.

The specification points that are covered in this revision lesson include:

• Recall and apply: distance travelled (m) = speed (m/s) x time (s)
• Recall and apply: acceleration (m/s2) = change in velocity (m/s) / time (s)
• Apply: (final velocity (m/s))2 - (initial velocity (m/s))2 = 2 x acceleration (m/s2) x distance (m)
• Recall and apply: kinetic energy (J) = 0.5 x mass (kg) x (speed (m/s))2
• Describe how to measure distance and time and use these to calculate speed
• Explain the vector–scalar distinction as it applies to displacement and distance, velocity and speed
• Recall and apply: force (N) = mass (kg) x acceleration (m/s2)
• Recall and apply: momentum (kgm/s) = mass (kg) x velocity (m/s)
• Recall and apply: work done (J) = force (N) x distance (m) (along the line of action of the force)
• Recall and apply: power (W) = work done (J) / time (s)
• Represent such forces as vectors
• Define momentum and describe examples of momentum in collision
• Recall and apply Newton’s third law
• Recall and apply: force exerted by a spring (N) = extension (m) x spring constant (N/m)
• Recall and apply: gravity force (N) = mass (kg) x gravitational field strength, g (N/kg
• Recall and apply: (in a gravity field) potential energy (J) = mass (kg) x height (m) x gravitational field strength, g (N/kg)
• Recall and apply: pressure (Pa) = force normal to a surface (N) / area of that surface (m2)
• Recall and apply: moment of a force (Nm) = force (N) x distance (m) (normal to direction of the force
• Calculate a spring constant in linear case
• Describe that all matter has a gravitational field that causes attraction, and the field strength is much greater for massive objects
• Define weight, describe how it is measured and describe the relationship between the weight of an object and the gravitational field strength (g
• Define and calculate the moment of the force in such examples
• Use the relationship between the force, the pressure and the area in contact

There is clearly a huge emphasis on the mathematical aspect of the subject in this topic and the various skills needed for success in the calculations are tested throughout this lesson. Students will enjoy the range of activities which includes quiz competitions such as “FILL THE VOID” where students compete to be the 1st to complete one of the 12 recall equations in this topic. This lesson is suitable to be used as a revision resource at the end of the topic or in the lead up to mocks or the actual GCSE exams