The problem that follow involve straight-line motion. The time t is in seconds unless othe...

The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.

Problem

The boat is moving at 10 m/s when its engine is shut down. Due to hydrodynamic drag, its subsequent acceleration is a = – 0.05v m/s2, where v is the velocity of the boat in m/s. What is the boat’s velocity 4 s after the engine is shut down?