A horse continues to apply a force in order to move a cart with a constant speed. Explain why?


When cart moves on the road it has to encounter friction. In order to keep the cart moving horse should overcome the friction. Hence it continues to apply the force.

  • Newton’s First Law states that a body remains in motion or at rest until an external force acts on it.
  • However, in this case, the horse must constantly exert force to move the cart since the force of friction is acting against the cart’s motion and opposing it.
  • As a result, the horse must exert force to overcome the frictional force.

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