recall examples of ways in which objects interact
electrostatics, gravity, magnetism and by contact (including normal contact force and friction)
recall examples of ways in which objects interact
electrostatics, gravity, magnetism and by contact (including normal contact force and friction)
describe how such examples involve interactions between pairs of objects which produce a force on each object
represent forces as vectors
drawing free body force diagrams to demonstrate understanding of forces acting as vectors
apply Newton’s First Law to explain the motion of an object moving with uniform velocity and also an object where the speed and/or direction change
looking at forces on one body and resultant forces and their effects (qualitative only)
**use vector diagrams to illustrate resolution of forces, a net force (resultant force), and equilibrium situations
scale drawings limited to parallel and perpendicular vectors only**
**describe examples of the forces acting on an isolated solid object or system
examples of objects that reach terminal velocity for example skydivers and applying similar ideas to vehicles**
**describe, using free body diagrams, examples where two or more forces lead to a resultant force on an object **
describe, using free body diagrams, examples of the special case where forces balance to produce a resultant force of zero (qualitative only)
apply Newton’s second law in calculations relating forces, masses and accelerations
explain that inertia is a measure of how difficult it is to change the velocity of an object and that the inertial mass is defined as the ratio of force over acceleration
**define momentum and describe examples of momentum in collisions
an idea of the law of conservation of momentum in collisions**
apply formulae relating force, mass, velocity and acceleration to explain how the changes involved are inter-related
use the relationship between work done, force, and distance moved along the line of action of the force and describe the energy transfer involved
calculate relevant values of stored energy and energy transfers; convert between newton-metres and joules
explain, with reference to examples, the definition of power as the rate at which energy is transferred
recall and apply Newton’s third law
application to situations of equilibrium and non-equilibrium
explain why an object moving in a circle with a constant speed has a changing velocity (qualitative only)