Motion and Force
When is an object in motion?
When its position changes.
What is speed and what does rate tell you the amount of?
Speed is the distance the object moves per unit of time. The rate tells you the amount of something that occurs or changes in one unite of time.
What does Newtons first law state?
An object at rest will remain at rest unless acted by a net force.
What does a constant slope represent?
Motion and constant speed.
What are some reference points?
tree,stop sign,and a building are good examples.
What is the equation in which you calculate speed?
Speed equals distance/time
What is resistant to change in motion?
inertia.
A force is described by its what two things?
By its strength an direction.
What happens when one object pushes or pulls another object?
the first object exerts a force on the second object.
What could happen if there is an error in velocity,either in speed and direction?
a collision
Which of Newtons law stated the size and direction of a net force equals the mass times acceleration?
Second law.
What happens when you multiply mass and acceleration?
You find out that force is measured in kilograms.
A force that pulls objects toward each other is a result of what?
A result of mass.
List the different ways an object could accelerate
increases speed,decreases speed, or changes direction
Acceleration is measured in?
Meters per second.
The more mass an object has the greater the what?
the greater the gravitational force between it and another object
Whats the reason why there is a nonzero net force on a object.
since the forces on the object are unbalanced
what is the equation for calculating acceleration?
acceleration=final speed-initial speed/time
If one object exerts force what does the second object do?
The second object exerts a force of equal strength.
Mass is a measure of what?
of the amount of matter in an object.