A motorboat crosses a straight section of a river where the water current flows from right to left at a constant speed of 0.80 m/s0.80\text{ m/s}0.80 m/s. The boat starts at point P on one bank and is steered at a constant speed of 1.50 m/s1.50\text{ m/s}1.50 m/s relative to the water, at right angles to the current.
Determine, relative to the river bank, both the magnitude and direction of the boat's velocity.
After 2.0 minutes2.0\text{ minutes}2.0 minutes, the boat reaches point Q on the opposite bank. Calculate the distance between P and Q.
When crossing the river, the boat's motor produces a constant forward force. Explain why the boat moves at a constant speed.
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.