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