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Use the “Force”
Physical Science
Unit 4, Chapter 1, Lesson 1
Forces
How to use “The Force”
What is Force?
Force- A push or a pull that changes the motion, size, or shape of a body Examples:
Buoyant force Compression Force Elastic Force Shearing force Tensile force
Forces-Two of a Kind?
Contact force Noncontact force
Contact Forces
Contact Forces require contact between two objects or substances. Buoyant Force- the
upward force that keeps things floating in a liquid
Video
Contact Forces
Elastic Force- the force that acts to pull a stretched object back to it’s regular shape
Contact Forces
Friction- the force that resists motion in two objects that are moving against each other
Friction Song!
Contact Forces
Compression Force- a force that results from pushing or squeezing an object
Contact Force
Tensile Force- the force that results from a pull exerted on an object
Video
Contact Force
Shearing Force- the force that distorts material by slippage along a plane parallel to the force
Video
Noncontact Force
Noncontact forces are forces that do not require contact Examples:
Gravitational Force Electromagnetic Force Weak nuclear force Strong nuclear force
Noncontact Forces
Gravitational force- the force that holds/returns an object to the proximity of that object
Video
Noncontact forces
Electromagnetic force- electric and magnetic forces coupled in one term for you! Stronger than gravitational force Determines the ways in which electrically
charged particles interact with each other Gravity vs electromagnetism
Noncontact Forces
Weak nuclear force- the force within the atomic nucleus that is responsible for certain types of radioactivity
Strong nuclear force- the force that works on the protons and the neutrons of an atom
Quiz
Be able to identify types of contact forces at work.
Be able to give me an example of each of the contact forces
