Physics of Motion
This is the unit for force
What is a Newton?
This term describes the amount of matter in an object
m=W/g
What is mass?
Friction is an opposing force. Meaning it acts ______ an objects motion
Against/Opposite direction of
This is the formula to calculate Speed
What is distance ÷ time?
Forces occurring between objects and the surfaces they are on
What is friction?
If an object is at rest, what is its velocity?
0 m/s
A hammer and a feather are dropped at the same time on the moon. They both reach the ground at the same time. Why?
What is the name of the force labeled "N"?
Normal Force
This must act on an object in order for the direction or speed of an object to change
What is an unbalanced force?
An object with a higher coefficient of friction will be _____ to move than an object with a lower coefficient of friction
Harder/more difficult
What is "g"?
Acceleration due to gravity
The attractive force that acts on all objects everywhere all the time
What is gravity?
An object is thrown straight up. At the top of its flight (max height) the velocity of the object is what?
0 m/s
The definition of acceleration
What is the rate of change in velocity?
μ: "mu" is the variable we use for what?
The Coefficient of Friction
The unit for velocity
Meters per second
The equation for total (net) force
What is F = m*a?
The force of gravity on the object; may be defined as the mass times the acceleration due to gravity
What is weight?
The difference between Speed and velocity
What is a direction / vector ?
I am riding a bike. I hit a fence, stopping the bike, but sending me over the handlebars. Which of Newton's Laws explains why this happens?
1st Law: Law of Inertia
An object in motion stays in motion, an object at rest stays at rest, unless acted on by an outside force
The distance a car travelled if it drove at 40 m/s for 30 minutes
What is 72 km?
D = v*t = 40 m/s * 1800 s
D= 72,000 m = 72 km
The mass of an object that is traveling at acceleration of 20m/s2 and a force of 10,000N
What is 500 kg?
m= F/a = 10,000 / 20
m= 500 kg
These are the two variables or things in a physical space that determine what the acceleration of an object will be
What are Force and Mass?
Markey Mark runs across the basketball court 5 times (from one side back to the other 5 times). Ending in his original starting place. What is Markey Mark's displacement at the end of his run?
0 meters. He ended where he started
A vector written as a negative (ex. -20 m/s). Can be going in what directions?
Left/west
Down/South