Force and Motion Created by: Shawna Adkins, Brandii Langham, Donna Sullivan, Marc Coombs, and Ryan Smith
How do we know about Motion? From the careful studies and observations of scientists. From direct observations of the world around us.
Famous Scientist who helped to explain Force and Motion
Galileo Galilei Gave us a better understanding of motion Objects of different masses fall at the same speed Gave us the Law of Inertia
Sir Isaac Newton Studied motion and gravity Things only move when something causes them to move. Gave us the Law of Motion.
What is motion? Motion is the way an object moves.
What are some examples of motion? Up Down Forward Backward Sideways Zigzag In a circle
Things in motion
Move your body! Up Down Forward Backward Sideways Zigzag In a circle
Force and Motion An object that has mass is acted upon by another object that has mass. This causes the object to start moving. Direction of Motion Applied Force Opposing Force, Friction
What is mass? Mass is a measurement of matter. Matter is the amount of stuff an object is made up of. Mass resists changes in motion.
Inertia Resistance to Motion An object with mass has inertia. The greater the mass, the greater the inertia. Once an object is moving it will stay moving because it has inertia.
This Rock has inertia. This rock will stay in place, unless it is pushed (a force is applied). Once it is pushed, it will roll downhill because gravity is pulling it toward the ground.
What is Force? A force is an external push or pull action applied to an object to cause it to be in motion, to change motion, or to stop motion.
Force is a push or pull to cause an object to: Start moving Stop moving Move faster Move slower
How we use force
Types of Force Gravity is a force between two objects with mass. Gravity keeps us from floating into space. Gravity forces objects/people to fall.
Types of Force Friction is a shearing/sliding of things being rubbed together Friction is the opposite force of the motion Force of Motion Friction
Types of Force Magnetic Force is a force between two objects that have magnetic properties. Electric Force is the force between two charged objects. _ +
Other types of force Deforming action Bending Pulling action Tension/stretching
Other types of force Turning action Torsion/twisting Pushing action Compression/ squeezing
How does mass relate to force? Force of Gravity mass Weight X acceleration due to the force of gravity = Weight = of ball Weight is a force that is equal to the Force of Gravity
How does mass relate to force? The more mass an object has, the greater the force needed to move the object. Gravity Lifting Opposes Gravity More Force Adding Mass
What Happens? Why is it easier to lift the trash can with partners? More force is acting on the basket Why is it harder to lift the trash can when more mass is added? Greater mass needs greater force Less mass needs less force
Summary Motion is the way an object moves. Mass is a measurement of matter. An object with mass has inertia. Force is an external push or pull action that is applied to an object to cause a change in motion.
The Law of Inertia An object at rest, will remain at rest unless acted on by an outside force. An object in motion will stay in motion, unless acted on by an outside force.
Law of Motion Forces cause acceleration. Acceleration is a change in motion. Acceleration is also related to the mass of the object.