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Transcript
Newton’s Laws of Motion Richard Allen Rick Muñoz Claudia Aguirre Who was Newton? • Newton was born December 25, 1643 the same day that Galileo died. He died aged 85 in 1727 • Newton was raised by his grandmother and studied Math, Physics, and Astronomy Trinity College Cambridge where he received both his Master’s and Bachelor’s degree. Newton Continued… • In college, Newton jotted his ideas (which became the three laws of motion) in his journal. He also had ideas about gravity, the diffraction of light, and forces. Today’s Objective • Students will be able to fully understand Newton’s three laws of motion in order to successfully play an educational physics video game. Newton’s First Law • Law I: Every body persists in the state of rest or moving uniformly straight, except when it is compelled to change its state by the force impressed upon it. This is called Inertia. • Galileo actually discovered inertia, but Newton rephrased it. DUDE YOU THIEF! YOU’RE JUST JEALOUS. What does this mean? • An object would remain in constant motion if it was for a force not to act against it. • Friction, air particles, gravity and other forces act against objects on earth causing them to not remain in motion forever. Law I Example • A skateboarder who pushes off his skate board for the first time will move in the direction it was pushed. Explanation • Rolling the ball on the ground…it moves but eventually it stops because of the friction that is acting on it… Newton’s Second Law • Acceleration is produced when a force acts on a mass. The greater the mass (of the object being moved) the greater the amount of force needed (to accelerate the object). Force is equal to mass times acceleration. What does this mean? • Essentially heavier objects require more force to move the same distance than lighter objects. Law II Example • It takes way more force to throw a bowling ball the same distance it does to throw a tennis ball. Newton’s Third Law • To every action there is always an equal and opposite reaction. What does this mean? • This means that for every force there is a reaction force that is equal in size, but opposite in direction. So whenever an object pushes another object it gets pushed back in the opposite direction equally as hard. Law III Example • Let’s use a pogo stick as an example. When you jump hard on a pogo stick the stick spring goes down. The ground pushes back up with equal force and you bounce up again. Sources • http://teachertech.rice.edu/Participants/louvier e/Newton/index.html • Khan Academy you tube videos • http://youtu.be/By-ggTfeuJU • http://youtu.be/ou9YMWlJgkE • http://youtu.be/CQYELiTtUs8 • Crayon Physics Game • Clipart