What is inertia?
- Inability to brake safely.
- Tendency for you and your motorcycle to move in a straight line ✓
- Speed
- None of the above
Answer: B. Tendency for you and your motorcycle to move in a straight line
Inertia is the tendency for you and your motorcycle to keep moving in a straight line.
Why this is the answer
The handbook describes inertia as what keeps a moving object going forward in a straight line. On a bike, that means you and the motorcycle want to keep going straight. It shows up when you brake, because inertia tries to keep the motorcycle moving, and in curves, because inertia tries to push you straight instead of turning. It also says the force is greater the faster you enter a curve, so the rider must work harder to stay on the road.
Why the other answers are wrong
- A. Inability to brake safely. — Inability to brake safely is not how the handbook defines inertia; braking is just one situation where inertia makes the motorcycle want to keep moving.
- C. Speed — Speed is not the definition; the handbook says greater speed into a curve increases the force of inertia, not that speed is inertia.
- D. None of the above — The straight-line tendency is described in the handbook, so none of the above is wrong.
Remember it
Remember it as the bike's straight-line stubbornness: brake or curve, it still wants to go straight.
Official handbook: ICBC Learn to Ride Smart, Chapter 6: see-think-do – do, p. 77