Question

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

Answer 1

he static friction is more than .the kinetic friction. During the first few steps of motionwhen the. cart is moving slowly, static frictionstillexistaSo the hOrse has to apply a greater'force to pull it-Later, thekineticfriction comesinto play which is less than the static friction.So, the horse has now to exert Iess to pull it.