Describing Motion
Acceleration
Friction & Force
Newton's Laws
Gravity
100
How far an object has traveled
Distance
100
What is the difference between speed and velocity?
Velocity includes direction, speed does not.
100
When 2 or more forces act on an object at the same time.
Net Force
100
AKA Law of Inertia
Newton's1st Law of Motion
100
Anything that is thrown or shot through the air
Projectile
200
Speed at any given point in time
Instantaneous Speed
200
What is the formula for Acceleration?
200
Friction is caused by microscopic bumps on surfaces called:
microwelds
200
The acceleration of an object depends of the _____ exerted on it and its ______.
Force and Mass
200
Gravity depends on ____ and _____ between objects.
Mass and Distance
300
What is the formula for average speed (S)?
S = d / t
300
What does the delta symbol stand for?
Δ
Change
300
This type of friction is when two surfaces are not moving past each other.
Static
300
Newton's 3rd Law states:
For ever action, there is an equal and opposite reaction.
300
Weight is measured in units called
Newtons
400
Tyler drives 60 km south. He then drives 30 km north.
What distance did he cover?
What is his displacement?
Distance = 90 km
Displacement = 30 km
400
A car increasing its speed from 55 mph to 70 mph is an example of what type of acceleration?
Positive Acceleration
400
What type of friction is a ball moving down a hill?
Rolling
400
A 6 ft tall basketball player can jump much higher than a 4 year old child.
Newton's 2nd Law
400
Which object exerts more gravitational force:
a. an object with a mass of 20 kg
b. an object with a mass of 40 g
a. an object with a mass of 20 kg
500
A hang-glider traveled 2.5 hours at a speed of 500 km/hr. What distance did they travel?
d = 1,250 km
500
A football player is running at 6 m/s. He trips over an opponents foot and rolls to a complete stop. This took a total of 4 seconds. What was his acceleration?
a = -1.5 m/s2
500
Friction-like force that opposes motion of objects that move through air; depends on speed, size and shape of the object.
Air Resistance
500
Formula for Newton's 2nd Law (Force)?
F = ma
500
Motion that is parallel to earth's surface is:
horizontal motion
600
Jimmy buys a canoe and travels 4 miles north up the river. The river makes a 90o bend east and he travels east for 7 miles.
What is the distance he has covered so far?
What is his current displacement?
Distance = 11 miles
Displacement = 8.06 miles
600
A car with an initial velocity of 10 m/s accelerates at a rate of 50 m/s2 for 2 seconds. What will its final velocity be?
vf = 110 m/s
600
If the net force equals 0
balanced force
600
What is the force of an object if its mass is 20 kg and its acceleration is 40 m/s?
F = 800 N
600
"Towards the center"
Centripetal