recall and apply Newton’s third law
recall and apply Newton’s third law
recall examples of ways in which objects interact: by gravity, electrostatics, magnetism and by contact (including normal contact force and friction)
describe how examples of gravitational, electrostatic, magnetic and contact forces involve interactions between pairs of objects which produce a force on each object
represent interaction forces as vectors
define weight
describe how weight is measured
recall and apply the relationship between the weight of an object, its mass and the gravitational field strength:
weight (N) = mass (kg) × gravitational field strength (N/kg)