The three fundamental laws presented by Newton are known as Newton’s laws of motion.
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Isaac Newton further studied Galileo’s ideas on force and motion.
The effect of frictional force can be minimized by using a smooth marble, a smooth plane, and providing a lubricant on top of the planes.
Galileo’s argument suggests that an unbalanced (external) force is required to change the motion of the marble, but no net force is needed to sustain its uniform motion.
If the right-side plane is made horizontal, the marble would continue to travel forever, trying to reach the same height that it was released from.