Speed And Newtons Laws Flashcards
To determine the acceleration of an object moving in a straight line you must…
Calculate the change in speed per unit of time
Acceleration
•Is the rate at which velocity changes
Inertia
The tendency of an object to resist a change in motion
Newtons first law of motion:
Law of inertia
An object in motion will stay in motion, an object at rest will stay at rest unless acted on by an outside force
Newtons second law of motion:
Law of acceleration
Acceleration depends upon the objects mass and force acting on the object
What is the unit label for newtons
N
What is the formula for force
Force equals mass times acceleration
What is the formula for acceleration
Acceleration equals force divided by mass
What is the formula for mass
Mass equals force divided by acceleration
Force
A push or pull
Newton
The SI unit that the strength of a force is measured in
Motion
If the distance from another object is changing
Reference point
A place or object used for comparison to determine if something is in motion
International system of units
System of measurement scientists all over the world use so they can communite clearly
Meter
The SI unit of length it’s a little longer than a yard
Speed
The distance the object travels per unit of time
Average speed
Divide the total distance traveled by the total time
Instantaneous speed
The rate at which an object is moving at a given instant in time
Velocity
Speed in a given direction
Slope
The steepness of a line on a graph
What is the formula for distance
Distance equals speed times time
What is the formula for speed
Speed equals distance divided by time
What is the formula for time
Time equals distance divided by speed
Three ways acceleration changes
- Increasing speed
- Decreasing speed
- Changing direction
What do you have to do to determine the acceleration of an object moving in a straight line
You must calculate the change in speed per unit of time
What is the formula for acceleration
Acceleration=
Final speed - Initial speed
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Time
What is the SI unit for acceleration
Meters per second per second
M/S2
Distance
The farther apart two objects are the less the gravitational force between them
Why do all objects fall at the same rate
Due to gravity
