摩擦力分三种。你知道是哪三种吗?现在就和美国的同学一起上一堂物理课吧!A soccer ball slows down as it rolls across the ground.This is due to friction.Friction isthe force that resists the movement of one surface past another.The ground is rough.Its surfacestops the soccer ball by pushing against it.Friction acts in the opposite direction of the ball’s Friction in three. Do you know what kind of three? Now with the American classmates a physical lesson! A soccer ball slows down as it rolls across the ground.This is due to friction.Friction is the force that resists the movement of one surface past another. The ground is rough. Its surfacestops the soccer ball by pushing against it. Role acts in the opposite direction of the ball’s