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?