Why does the driver of a loaded car, seeing a red traffic light, brake earlier than the driver of an empty car moving next to the same speed?
The mass of a truck is much greater than that of a passenger car.
Body mass is a measure of body inertia.
Inertia of the body is the property of the body to keep its state constant.
The more body weight, the more difficult it is to change its state.
It is more difficult for a truck to stop, it needs more time and more frictional force than a passenger car.
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