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# Newton's Laws

### These are flashcard for the unit of Newton's Laws

For every action, there is an equal and opposite reaction. 3rd Law
What is the equation FORCE f=ma
The motion of an object will not change is the net force is ZERO (inertia) 1st Law
What is the gravitational force on any object near Earth's surface? 9.8 m/s/s
Gravitational force is influenced by what TWO factors? mass and distance
______ is the force that will oppose any body or object in motion. Friction
Which force explains why we lunge forward when we are in a car that stops suddenly? Inertia
When a force acts on an object in the SAME DIRECTION of the motion of the object, the object will _____________ move forward and gain speed.
When a force acts on an object in the OPPOSITE DIRECTION of the motion of an object, the object will ____________ move backward and lose speed/stop.
Astronauts weigh less in space than here on Earth because ___________ the gravitational pull isn't that great.
You hit a table with a fly swatter. Describe the reaction force. The table pushes back on the fly swatter with EQUAL FORCE
A semi truck collides with a Honda civic. What is the momentum of the vehicles before and after the crash? The SAME
What happens when a large marble collides with a stationary small marble? LM hits SM. Both marbles continue moving it the direction LM hit SM.
How does a lubricant work to reduce friction? There is less rubbing since the lubricant fills the microscopic bumps and ridges.
Force Push or pull
Inertia Tendency of an object to resist change in motion
STATIC Friction Opposes motion; keeps an object at rest
Relationships between forces, mass and acceleration 2nd Law
SLIDING Friction Opposes the motion of surface rubbing past each other
FLUID Friction Opposes the motion between a surface and a fluid ( Air resistance: more surface area = more friction )
BALANCED Force Doesn't change the motion of an object (Net forces = 0)
UNBALANCED Force Does change the motion of an object (Net forces do NOT = 0)
Force Pair The force 2 objects apply to each other (Action: swimmers hand pulls water back Reaction: water pushes swimmer forward)
Momentum Law that states the total momentum of a group of objects stays the same unless an outside force acts on the objects
Created by: emma_ambrosia