O-LevelPhysicsForces5054/11 · Oct/Nov 2011 · Q61 Mark
An engine pulls a truck at constant speed on a level track. The link between the truck and the engine breaks. The driving force on the engine remains constant. What effect does this have on the truck and on the engine?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Atruck: slows down, engine: speed stays constant
Btruck: slows down, engine: speeds up
Ctruck: stops immediately, engine: speed stays constant
Dtruck: stops immediately, engine: speeds up
✓ Correct answer
B: truck: slows down, engine: speeds up
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