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BDifficulty 1/5

In the model F = m·v²/r, with speed and curve radius held constant, which factor determines the required centripetal force?

Correct answer

Vehicle mass.

Vehicle mass: at the same speed and radius, greater mass requires greater centripetal force. In general it also depends on speed squared and the path radius; mass should not be described as the main factor without specifying these conditions. The net force points towards the centre of curvature and changes the direction of motion. On a flat road, tyre grip must supply the necessary lateral force.

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  • Only vehicle height, even if mass changes.

  • Vehicle mass.

  • The driver’s age.

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