Question

a horse continues to apply a force in order to move a cart with a constant speed.explain​

Answer 1

Answer:

Explanation:

According to Newton's First Law a body remains in its state of motion or rest until an external force acts on it.

But in this case the horse has to continously extert the force to move the cart, this is because the force of friction is acting against the motion of the cart which us opposing its motion.So the horse has to apply force to overcome this force of friction.

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Answer 2

Answer:

When the cart starts moving, frictional force starts working on the wheel of cart in opposite to the motion. So, horse need to apply continuous force in forward direction to maintain constant speed.