Forces amp Gravity Notes Write down the words in yellow The words in white are discussion points you may write these down but are not required Gravity Gravity is a force that pulls objects toward each other ID: 927137
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Slide1
Gravity
Balanced and Unbalanced
Forces & Gravity
Slide2Notes
Write down the words in yellow.
The words in white are discussion points, you may write these down, but are not required.
Slide3Gravity
Gravity is a
force
that pulls objects toward each other.
Gravity
attracts
objects toward each other even if the objects do not
touch
.
Slide4Gravity
You probably think of gravity as a force pulling objects toward the ground. But this force acts everywhere in the universe – not just on Earth.
Gravity pulls
ALL
objects in the universe toward each other.
Slide5Balanced and Unbalanced Forces
Remember that a force is a push or pull on an object.
Balanced
forces are forces that cause an object to remain in place.
A bench on the street could represent a balanced force. The force of gravity pulling the bench down is balanced by the force of the street pushing the bench up.
Slide6Balanced and Unbalanced Forces
Unbalanced
forces can cause an object to start moving, stop moving, or change direction.
Unbalanced forces
change
the motion of objects.
The change in motion depends on three main factors:
direction
of force applied,
strength
of the force, and
mass
of the object.
Slide7Balanced and Unbalanced
Forces
Picture a hammer striking down on a nail. The hammer striking the nail represents unbalanced forces. The hammer strikes the nail with a strong downward force. The downward force of the hammer is greater than the force of the wood pushing up on the nail. Thus, the nail moves into the block of wood.
Slide8Watch the following videos:
Forces (Brain Pop)
https://www.brainpop.com/science/energy/forces
/
Gravity and Inertia (Study Jams)
http://
studyjams.scholastic.com/studyjams/jams/science/forces-and-motion/fgravity-and-inertia.htm
Newton’s Third Law: Action and Reaction (Study Jams)
http://studyjams.scholastic.com/studyjams/jams/science/forces-and-motion/action-and-reaction.htm
Slide9Exit Ticket
What is gravity?
2) What is the relationship between balanced and unbalanced forces and the motion of an object?