Question

1. If action is always equal to the
reaction, explain how a horse can pull a cart​

Answer 1

Answer:

When horse applies his force then the surface tries to stop them by friction. Horse has the power of overcoming the force of pulling cart because he has the power of overcoming the friction produced by the surface area.

As we know if friction increases, surface area decreases. So by using this formula or a line we can think that how will he able to overcome the force.

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Answer 2

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When the horse walks in the forward direction (with the cart attached to it), it exerts a force in the backward direction on the Earth. An equal force in the opposite direction (forward direction) is applied on the horse by the Earth. This force moves the horse and the cart forward.

The velocity at which the horse can move by applying a force on the earth depends on the mass of the horse (and the cart attached to it). The heavier the cart, the slower the motion of the horse (for a given amount of force applied by the horse on the Earth). If the cart is too heavy, the force exerted by the horse on the Earth will be insufficient to even overcome the force of inertia. In this case, the horse will not be able to pull the cart.