Why would a real truck be harder to stop than toy truck?

Inertia: A real truck has much more mass than a toy truck. According to Newton's First Law of Motion, an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an external force. This means that it takes a greater force to stop a moving real truck than it does to stop a moving toy truck.

Friction: The tires of a real truck create more friction with the road surface than the wheels of a toy truck. This is because the tires of a real truck are made of rubber, which has a higher coefficient of friction than the plastic or metal wheels of a toy truck. The greater friction between the tires and the road surface makes it more difficult to stop a real truck.

Air resistance: A real truck has a larger surface area than a toy truck. This means that it experiences more air resistance when it is moving. Air resistance acts as a drag force that opposes the motion of the truck, making it more difficult to stop.

In summary, the combination of inertia, friction, and air resistance makes a real truck harder to stop than a toy truck.