To manage to start moving with a loaded bus, what mechanical condition must be met?

Question

DentroTest · Accepted Answer

For a heavy vehicle such as a loaded bus to start moving from a standstill, the driving force transmitted to the wheels must necessarily exceed the total resistance opposing that movement (force of inertia, rolling friction and the weight of the vehicle, especially on a slope). If the force were lower or equal, the bus would remain stationary or the engine would stall. It is incorrect to think that you must rev to maximum revs, since this would cause excessive fuel consumption and harmful wear on the clutch and transmission; it is enough to use the maximum torque range. Nor must high gears be selected to start off, since they reduce the available traction force; when starting off with a load, low gears that multiply the driving torque are required.

To manage to start moving with a loaded bus, what mechanical condition must be met?

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