Newton's Laws in Running Laura Adams

Newton's First Law: "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." The runner were remain at rest until another force acts upon it. When the runner starts to move they're pushing their feet against the ground allowing runner to progress.

Newton's Second Law: "The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."The force exerted while running causes acceleration depending on how forcefully the runner apply's the force during diffrent times throughout the run.

If Usain Bolt and Justin gatlin are in a race and Both of their intial velocitciies are 0, and Gatlin's Final velocity is 27 m/s but bolt's final velocity is 20 m/s, and they both ran for 10 seconds who has a faster acceleration?
USain Bolt: 2 m/s Justin Gatlin: 2.7 m/s Bolt would have a faster acceleration

Newton's Third Law: "For every action, there is an equal and opposite reaction." When the runner's foot comes in contact with the ground using equal and opposite force to continuously propel the runner forwards.

Usa and Jamaica are running in the 100 meter sprint. The girls on team usa are about 63 kg and the girls on team jamaica are all about 60 kg. Jamaica's velocity is 2 m/s and Usa's is 3 m/s. who has enough momentum to win the race?
Jamaica: 120 kg-m/s kg-m/s Usa:189 kg-m/s Usa has more momentum and wins the race

Sources: https://newtononthetrack.wordpress.com/newtons-laws-of-motion/ , http://www.aaronswansonpt.com/basic-biomechanics-newtons-laws-of-motion/

Credits:

Created with images by VoidHog - "track outdoors race" • bonnieann1815 - "Runners" • morzaszum - "spot runs start" • friskytuna - "usain bolt" • ThomasWolter - "relay race competition stadium" • Agência Brasil - "Provas de Atletismo nas Olimpíadas Rio 2016"

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