Vehicles like trucks and buses generally have double wheels at the back to increase the area of contact on which their weights acts and thus help reduce the

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Friction

Pressure

Force

None of the above

answer is B.

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Detailed Solution

Vehicles like trucks and buses generally have double wheels at the back to increase the area of contact on which their weights act and thus help reduce the pressure.
Since pressure is inversely proportional to area, the smaller area will apply more pressure, and the broader area will apply less pressure. Hence, Vehicles like trucks and buses generally have double wheels at the back to increase the area of contact on which their weights act and thus help reduce the pressure on the ground.

Pressure = \frac{Force}{Area}

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