Okay kiddo, let's talk about tractive force.
Have you ever tried to drag something heavy, like a big box or a piece of furniture? It can be really hard to move it, right? That's because the object has a lot of resistance, or friction, with the surface it's on.
Well, when we talk about tractive force, we're talking about the force that helps us overcome that resistance and move the object forward. It's kind of like a superhero power for machines like cars, trains, and bulldozers.
Imagine you're playing with your toy car, and you want it to go really fast. You push it with your hand, and the wheels spin and the car moves. The force you used to push the car is like the tractive force, because it helped overcome the resistance of the car's wheels on the ground.
But it's not just about pushing something forward. Tractive force can also help a vehicle climb up a hill, or pull a heavy load like a trailer. When a vehicle has more tractive force, it means it's better at overcoming resistance and moving forward, even if the load or terrain is challenging.
So, to sum it up: tractive force is the strength that helps machines like cars and trains overcome resistance and move forward, like a superhero power!