Issac Newton and His Laws of Motion

BY: Mona ChiangPowerpoint created by Chikila Moore

Introduction

• Why does the ball always bounce back after it hits the floor?

• Why can’t I jump so high that I fly above the hoop?

• Newton’s laws use math to explain how everything moves.

Who Was Newton?

• Newton’s father died 3 months before he was born.

• His mom married a rich preacher.

• He was sent away to his grandparents and to school.

• His father was a farmer who could not read or write.

• Issac’s teacher put him a the bottom of his class but he soon became a top student.

Man of Many Sciences• Newton made key discoveries.• Newton studied what other

scientist had learned about this.

• This law explains that all objects in the universe have gravity.

• Newton was the first to recognize that the force holding an object to earth is the same as the force holding the moon.

• He used his knowledge of optics to build a powerful telescope.

First Law of Motion

• Our push is the force that makes a ball move.

• A scientists named Galieo Galilei conducted many experiments to test new ideas.

• He studied Galieo Galilei’s work on motion.

First Law In Action

• Something needs force to move.

• Something has to keep moving at the same speed.

• Friction is a force that occurs whenever two objects rub against each other .

• This soccer ball has friction.

Other Forces

• The force of gravity pulls the ball down.

• Newton’s first law applies to more than soccer.

• What force or forces might cause those change?

First Law and Space Travel

• Friction and gravity affect just about every object on earth.

• Outer space has no air particles to cause friction.

• Only a force such as the firing of rocket engines.

Inertia

• Newton’s first law shows that an object will not change its motion.

• An object resists any change in motion.

Acceleration

• Acceleration is how fast an object changes speed or direction or both.

• You can accelerate when you turn the corner because you change direction.

Math Behind The Law

• The second law of motion shows how force , mass , and acceleration are related or connected

force=mass*acceleration.

Units of Force

• Every measurement includes a number and a unit. Units are called newton’s named after Issac.

Newton’s Third Law of Motion

• The third law of motion means that forces always act in pairs.

• When one object exerts a force on another object.

The Third Law In Action

• You move toward the desk. You pulled on the desk and the desk pulled on you in the opposite direction.

Conclusion

• Today , engineers use these laws to determine how much force is needed to boost a rocket into space.

• His laws are to design many things. Machines could not have been invented without understanding the laws of motion.

When year was Issac Newton born?

• 1)1964• 2)1642• 3)2020• 4)1968

How did Issac’s father die?

• 1)you don’t know.• 2)he died in a car

accident.• 3)somebody shot him