Why are counterweights fixed on stacking tractors before work?

The counterweights are secured to prevent the tractor from overturning. The lifters, with the help of which I lift the bales of hay, act as a lever on which the gravity of the bale of hay acts. Since the length of the lift is large, the moment of force that acts on the tractor will be significant. The moment of force M is the product of the gravity of the hay on the lever arm, and the length of the hoist.
To prevent the tractor from overturning (balance condition), the same moment of force must act on the opposite side. Due to the large mass, the counterweight creates a moment of force capable of balancing the moment of force of the hay.



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