IB Physics SL A 1 7 Uniform Vs Non Uniform Acceleration Topic Practice

This question is in two parts. Part 1 is about the motion of a ship. Part 2 is about melting ice.

The ship's engines are switched off and the ship comes to rest from a speed of $7 \mathrm{~m} \mathrm{~s}^{-1}$ in a time of 650 s .

It is unlikely that the acceleration of the ship will be uniform given that the resistive force acting on the ship depends on the speed of the ship. Using the axes, sketch a graph to show how the speed v varies with time t after the ship's engines are switched off.