An engine pulls a boat downstream with a thrust of while the river water exerts a…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An engine pulls a boat downstream with a thrust of 120N while the river water exerts a drag force of 90N upstream. After some time, the engine is switched off, but the drag of 90N continues. What will the boat do immediately after the engine stops?
(a) It will start slowing down, moving downstream
(b) It will continue moving at constant speed downstream
(c) It will come to rest at once
(d) It will accelerate upstream