## Running and newton's three lawsBy: Malcolm Wilson

p= mv is the fromula formomentum and it means momentum equals mass times velocity.

People walk and move and run every day, but they don't always realize that their movement can be explained with Sir Isaac Newton's three Laws of Motion.

Newton's First Law, the law of inertia, states that a object at rest stays at rest until acted upon by an outside force. In running you stay at rest until you move your legs, which fight gravity and use friction to push you forward.

Isaac Newton's Second Law explains that the acceleration of an object is dependent upon two variables--the net force acting upon the object and the mass of the object. In running gravity is the net force acting against you, your muscles are what cause you to accelerate against the gravity. Your mass stays the same, but depending on the field of gravity you're in, your weight can change. If the gravity is stronger, you're heavier, if the gravity is weaker, then you're lighter. When you're lighter but exert the same amount of force, you will go faster.

Newton's Third Law states that forces act in pairs. For every action force, there is a reaction force. Newton's third law of motion is that for every action there is an opposite reaction. this means when you run every time your foot hits the ground the ground pushes back with equal and opposite force. It is this force that propels you forward.

work cited

wikipedia

Credits:

Created with images by Wow_Pho - "dog cute pet" • 422737 - "asphalt line sneakers" • hardloperhans - "3297" • terren in Virginia - "Running" • hannahpirnie - "track running sport" • slgckgc - "Running the Half Marathon" • skeeze - "runner race competition" • cogdogblog - "Fresh Start" • Stevebidmead - "runners male sport" • Nick J Webb - "Run"