(a)[1]
State what is meant when a quantity is described as a vector.
(b(i))[3]
The swimmer uses his legs to push on the pool’s end wall. Explain, in terms of Newton’s third law, why he accelerates away from the end wall.
(b(ii))[3]
While swimming, a constant forward force acts on the swimmer. His speed increases until, in the end, it becomes constant. Explain why he reaches a constant speed.