Force
What is...the push or pull on an object?
Force
What is is the force of attraction between objects due to masses?
Gravity
What are the two types of friction?
Reduction of friction & Increase of friction
What is the difference between speed and velocity?
Velocity has a direction while speed ONLY has a magnitude (a number)
Name two facts about Isaac Newton.
- he created the 3 Laws of motion
- his birthday is different (calendar change)
- he loved chemistry
- he discovered gravity
What are the two main types of forces?
1) Contact
2) No-Contact
What is the difference between mass and weight?
Mass is consistent (usually in g) while weight changes based on location (usually in N).
Friction is a contact force that resists motion between two objects. What units does it have?
Trick question! It does NOT have any units because it is a ratio with force
What is the difference between scalar quantity and vector quantity? Provide an example of each.
Scalar Quantities - a value that ONLY has a magnitude and NO direction;
Vector Quantities - a value that has BOTH magnitude and direction
What is Newton's third law?
Action & Reaction.
When one object applies force to a second object, the second object applies an equal and opposite force to the first object.
All forces have _____________ and _____________, which are usually helpful in drawing a force diagram
All forces have directions and strength
Energy released and propagates in all directions as ________ ________ causing earthquakes.
seismic waves
What type of friction are breaks on a car?
Increase Friction
Name the units for EACH vocabulary word:
Speed, Acceleration, Velocity.
Speed (m/s),
Acceleration (m/s2),
Velocity (m/s)
Describe in mathematical terms Newton's second law of motion.
F = ma
(force is equal to mass times acceleration)
What is the Net force?
If BOTH people are pushing a box of textbooks in the same direction (to the right) and one person is pushing with 20 N while the other person is pushing with 40 N, what is their net force?
60 N to the RIGHT
Earthquake waves...
1) what are they?
2) how do they move?
3) what do they travel through?
Primary (P) Waves - compression waves; travel through solid & liquid
Secondary (S) waves - travel side to side; only solid
BONUS: surface waves (Love & Rayleigh waves)
What type of friction is between a moving object and the air around that object?
Air resistance
What are the two ways acceleration changes?
1) the speed changes
2) the direction of motion changes
Provide an example of Newton's first law
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
Name at least 5 types of forces (we talked about 9)!
Applied Force
Spring Force
Drag Force
Frictional Force
Normal Force
Tension Force
Magnetic Force
Electric Force
Gravitational Force
Gravity impacts our world many different ways. Name at least 5 ways that gravity impacts us!
Gravity (Physics) - weight, falling objects, stability
Gravity (environment) - tides, atmosphere, gravitropism
Gravity (biological) - bones, muscles
Explain the type of friction going down a slide!
- increased or decreased?
- type of clothing?
- good or bad friction?
Explain the difference between distance and displacement.
Displacement is the change in an object’s position while distance is the actual amount traveled
Solve this equation using Newton's second Law (F=ma) when force is 50 N and mass is 5 kg, what is acceleration?
F = ma
50 = 5xA
50/5 = A
10 m/s2 = A