Physics (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Physics — Higher · Specification point · 6.5.4.2.2 · Forces · Forces and motion
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6.5.4.2.2 Newton's Second Law
| Content | Key opportunities for skills development |
|---|---|
Newton’s Second Law: | |
The acceleration of an object is proportional to the resultant force acting on the object, and inversely proportional to the mass of the object. As an equation: | MS 3a Students should recognise and be able to use the symbol for proportionality, ∝ |
force, F, in newtons, N
mass, m, in kilograms, kg
acceleration, a, in metres per second squared, m/s²
MS 3b, c WS 4.2 Students should be able to recall and apply this equation. |
(HT only) Students should be able to explain that:
| MS 3a |
Students should be able to estimate the speed, accelerations and forces involved in large accelerations for everyday road transport. Students should recognise and be able to use the symbol that indicates an approximate value or approximate answer, ̴ | MS 1d |
Required practical activity 19: investigate the effect of varying the force on the acceleration of an object of constant mass, and the effect of varying the mass of an object on the acceleration produced by a constant force.
AT skills covered by this practical activity: physics AT 1, 2 and 3.
This practical activity also provides opportunities to develop WS and MS. Details of all skills are given in Key opportunities for skills development (page 189).