(a(i))[4]
Determine, with respect to the river bank, both the size and the direction of the swimmer’s velocity.
(a(ii))[3]
Calculate the separation between P and Q.
(b)[2]
Explain why he travels at a constant speed.
Physics 0625 · IGCSE · Motion
Motion — practice question
Fig. 1.1 depicts a straight stretch of river in which the water moves from right to left at a speed of 0.54 m/s. A swimmer sets off from point P and travels at a steady speed of 0.72 m/s relative to the water, moving at right angles to the current.