Concept Reveiw Flashcards
What are Newton’s Laws?
- When the Fnet =0 the object will not acceleration
- F=ma
- Every force has an equal and opposite reaction
What is Inertia?
Fancy word for mass;
How much an object resist change
Why can Fg and FN not be interactive pairs?
Because they act on the same object
What is acceleration?
A change in velocity
If two different mass amount had the same amount of force applied, would the heavier or light one take more time to reach maximum speed? Why? Which law supports this?
Newton’s 2nd Law: F=ma
Same Force applied, Larger mass -> smaller acceleration. If acceleration smaller it will take more time to reach max speed.
What does the magnitude of an acceleration impact?
Smaller acceleration = more time to reach max speed
Bigger acceleration =less time to reach max speed
When a car was moving why did the speed not change? Which law applies
The forces on the car were balanced so no acceleration (Newton’s 1st law)
What happened if force and velocity are in the same direction?
Acceleration and velocity are in the same direction too which > object speed up.
What happens when force is opposite of velocity?
Then acceleration is opposite of velocity > object slows down
How does mass relate to inertia?
They are the same: more mass in object more resistance to change in motion
What direction does normal force go in?
Perpendicular to the surface
What does Normal Force do?
Pushes hard enough to keep vertical
Fnet= 0 (don’t go through the floor)
Is mass always the same? T or F
True, mass is always the same.
What does Fg mean and what else represents it?
Fg = mg (mass x gravity)
What are the two types of friction?
Kinetic friction and Static friction
