Science Forces Lesson

6.7A Balanced v Unbalanced Forces

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Gravity

6th Grade

What is Gravity?

The force of attraction between 2 or more

masses

What is the force that governs all

planetary movement in the solar

system??

The gravitational pull from the Sun

How does the mass of an object

affect gravity?

The greater the Mass, the greater the

gravitational pull

How does the distance between two
objects affect the force of gravity?

As the distance between two objects

increases, the amount of gravitational pull on

the object decreases

Multiple Choice

Gravity is a _____ that _____

2 objects towards one another.

• thing

  reaches

• energy

  pushes

• force

  pulls

• weight

  takes

Multiple Choice

What two things determine the gravity of an object?

• length & height

• mass & distance

• color & mass

• volume & distance

Multiple Choice

The planet Mars has less gravity than Earth. This is because Mars has ___________ mass than the planet Earth.

• less

• more

• the same

Multiple Choice

What keeps the planets in orbit around the sun?

• gravity

• friction

• magic

• distance

Forces Notes…

6.7A

Objective:

Identify and explain how forces act on objects,
including gravity, friction, magnetism, applied forces,
and normal forces, using real-world applications.

Balanced and Unbalanced Forces

© KeslerScience.com

Balanced Forces

•Two forces equal in size
and acting in opposite
directions on an object.

•The object stays still or
continues to move at the
same (constant) speed
and in the same direction.

Unbalanced Forces

•Two forces that are unequal in
size and opposite in direction.

Balanced and Unbalanced Forces

©

KeslerScience.

com

•Always cause a
change in motion in
one of these areas:

• position
• direction
• speed

What is Gravity?

The force of attraction between 2 or more

masses

Frictional Force…

❏ Force that resists sliding or rolling of one solid

object over another.

❏ Always occurs in the opposite direction that an

object is moving.

Force of Magnetism…

A pulling force of attraction between a magnet and a
metal object.

Applied Forces…

The “push” or “pull” exerted on an object.

Normal forces….

● The force that the surface exerts on an object to

prevent the object from passing through the
surface.

● This force is always perpendicular to the surface

that the object is on.

Multiple Choice

Force

• push or pull

• mythical star wars powers

• can only happen with contact

• only gravity

Multiple Choice

What is a force that acts at a distance?

• A force that requires contact

• can be applied without contact between objects

Multiple Choice

Friction

• Contact Force

• Force at a distance

Multiple Choice

Normal Force

• Contact force

• Force at a distance

Multiple Choice

Contact force

• A force that can only be applied with touch

• A force that can act at a distance

Multiple Choice

Applied force

• Contact force

• Force at a distance

Multiple Choice

What force is your chair acting upon you right now so you don't fall to the floor?

• applied

• normal

• gravity

• friction

Multiple Choice

What force would prevent you from pushing a heavy box across the floor?

• applied force

• friction

• normal force

• air resistance

Multiple Choice

Magnetism

• Contact

• Force at a distance

Multiple Choice

Air Resistance

• Contact Force

• Force at a distance