Newton’s 3rd Law
Newton’s 3rd Law is sometimes written that ‘to every action there is an equal and opposite reaction'; a vague statement frequently misinterpreted. The law really states that forces occur in equal and opposite pairs of the same type: if a body A exerts a force on a body B, B will exert an equal and opposite force on A.
So, if a table of weight W rests on the ground, can you define the force which is its Newton 3rd Law pair?
Answer on the Canterbury Easter Revision page.