Force and motion
Net Forces
Balanced or unbalanced
Force Potpourri
Vocabulary
100

Two conditions when an object may have balanced forces.


What is at rest or moving at a constant speed. 

100

Calculate the net force:

1 N to the Right

100

Net Force=zero



What is balanced?

100

What is it called in that objects want to resist their change in motion?

What is Inertia?

100

What is the unit of force?

What is a Newton?

200

Give a definition of balanced force and a definition of unbalanced force.

balanced = equal forces

unbalanced = unequal forces

200

Calculate the Net Force:

3 N to the Left

200

A person jogging at a constant speed around a circular track.



What is Unbalanced---change in direction

200

What two things do vectors have?

What is size (magnitude) and direction?

200

What instrument measures the force on an object?

What is a spring scale?

300

List 3 Contact Forces and 3 Non-Contact Forces

Contact

Applied, friction, tension, thrust, lift, spring

Non Contact

Gravity, Electrostatic, Magnetic

300

Calculate the Net Force:

1 N to the Right

300

A tug of war with equal magnitude on both sides.



What is balanced?

300

What happens to the gravity between objects when the masses between them decreases? What type of relationship is this>


What is gravity decreases. What is direct.

300

What is drag?

What is air resistance (friction from air)?

400

List the 3 things a force can do

Change size/shape of object

Change in direction

Change in speed

400

Calculate the Net Force:

224 N to the right

400

An object accelerating.



What is unbalanced?

400

What is the the force from a solid surface onto an object called?

What is the Normal Force?

400

What does the word kinetic mean?

What is moving/motion?

500

A ball is dropped straight downward and hits the floor.  What is the direction of the force exerted by the floor on the ball?

Upward in the exact opposite direction as the drop

500

Calculate Net Force:

0 N, balanced (no direction movement)

500

3 ways of acceleration



What is increase in speed, decrease in speed, change in direction or change in shape?

500

Define the weight of an object and define the mass of an object.

weight--force of gravity on an object

mass-amount of matter in an object

500

What is magnitude?

What is the strength/amount of force?

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