Question

Why does a horse pull its cart harder during the first few steps of its motion?

Answer 1

Hint:When the moving force and the force opposing motion are equal, limiting friction occurs; any increase in the moving force causes sliding. The natural reaction between the touching surfaces determines the limiting frictional force, which is independent of the contact region. The friction that a body encounters while it is in motion is known as dynamic friction.

Complete answer:
The horse needs to work against the full benefit of static friction that comes into play when a body is only about to slide over the top of another body, the horse has to pull the cart faster in the first few steps of his motion. Limiting friction is the name given to this kind of friction.If the motion begins, the horse must respond to the friction that occurs as one surface moves over another with touch, a phenomenon known as dynamic friction.

The restricting friction is less than the dynamic friction. The horse has to drag the cart faster during the first few phases of his motion when he is working against the limiting friction, whereas as the motion begins, the horse is working against the dynamic friction, which is weaker than the limiting friction.

As a result, the horse would have to use more effort to drag the cart over the first few moves.

Note:Friction is the force that opposes motion of any two surfaces that come into contact with one another. Static, slipping, spinning, and fluid friction are the four forms of friction. Solid surfaces experience static, slipping, and rolling friction.