Defenition
Friction
formula that relates speed, distance, and time
s=d/t
Mass
Kg
If a car travels 150 km in 3 hours, what is its average speed?
50km/h
help us understand the relationship between forces and motion.
Newtons laws of motion
amount of matter in an object
Mass
Meaning of v0 and vf
initial velocity and final velocity
An object that slows down has________ acceleration
negative
If two cars move toward each other, their relative speed is
The sum of their speeds
Newton's First Law, also called the Law of
inertia
resistance to change in motion called
Inertia
rate at which velocity changes with time
Acceleration
Force
Newton
If a car’s velocity increases from 10 m/s to 30 m/s in 5 seconds, its acceleration is:
4m/s2
Newton's Second Law is often written as
F=ma
push or pull on an object
Force
Value of gravity
9.81 m/s2
Acceleration
m/s2
Two forces act on an object in the same direction, one of 8 N and another of 5 N. What is the resultant force?
13 N
Newton's Third Law, also known as the Law of
action-reaction
Which force is in a rope or cable being pulled
Tension
F=ma
Weight
Newton
If acceleration increases, velocity will
increase
A book on a table will remain at rest until someone applies a force to move it, example for the ________law of motion
1st