Describing Motion and Force
the state in which one objects distance from another is changing
What is motion?
distance/time
An object tends to stay at rest without an outside force acting on it.
What is newton's first law?
The type of surface and how hard they are pushing against each other
What are the factors of friction?
When an object rolls across a surface, what type of friction is being used.
Rolling friction
a push or a pull
What is the difference between instantaneous or average speed?
A particular instant in time is one speed but the average is all of the instantaneous speeds.
Force equals acceleration time mass
What is newton's second law?
The mass of each object and the distance between them.
What factors affect gravity?
Two solid surfaces slide across each other
Sliding friction
Which creates more motion, a horse pushing a rock or a bird pushing a rock?
A horse pushing a rock creates more motion.
Why is slope being used in this lesson.
It finds the average of all the speeds on a graph.
Every action has an equal and opposite reaction.
What is newton's third law?
mass times acceleration
What is the formula to find net force?
occurs when a solid object moves through a liquid
fluid friction
two surfaces exert on each other when they rub against each other
What causes friction.
What is velocity compared to speed?
Velocity is the direction an object travels, while speed is the just how fast.
What is the relationship between inertia and mass?
The more massive an object has a greater inertia.
What are forces and motion both related to?
what force is keeping the couch from moving?
static friction
there is a nonzero net force acting on the object
what is an unbalanced force?
final speed-initial speed/time
The formula of acceleration?
What is acceleration measured in?
It is measured in meters per second squared.
(GPE) equals mass times acceleration due to gravity times height
How to find gravitational potential energy?
What force is used when an airplane is flying in the air.
Fluid friction