Correct answer
Tractive force must be greater than the forces opposing forward movement.
Tractive force must exceed resistance to forward motion so that there is a net forward force. On a level surface, weight is not a horizontal force that must directly be overcome; loading can increase rolling resistance and the mass to be accelerated. Uphill, a component of weight also opposes climbing. Select a ratio suitable for the load and gradient according to the vehicle’s instructions; higher gears or maximum engine revs are not always required.
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Tractive force must be greater than the forces opposing forward movement.
Higher gears than when unloaded must always be used.
The engine must always be run at maximum revs.
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