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An illustration of a horse pulling a cart, showing a free body diagram with arrows for Normal force, Gravity, Forward force, and Backward force.

An illustration of a horse pulling a cart, showing a free body diagram with arrows for Normal force, Gravity, Forward force, and Backward force.

Free Body Diagram for the horse: Forward force: Pull from the horse’s muscles Backward force: Friction and the resistance from the cart Upward: Normal force from the ground Downward: Gravity (weight of the horse) See more