Test 12/16 Flashcards
how can mass influence gravity?
2/3
everything with mass has gravity. large mass means a strong force of gravity, while small mass is a weak force of gravity.
how does distance affect gravity?
3/3
the further away something is, the weaker the gravity will FEEL, while the closer an object is, the stronger gravity will FEEL
what is friction?
1/3
a force that opposes motion
what’s the cause of friction?
2/3
friction is caused when the “hills and valleys” catch and snag on each other when 2 surfaces are closely pressed together
where does the “pull” in friction actually come from? 3/3
.
name 3 ways on how we can increase friction?
Increase mass
Increase push or pull
Make the surface rougher
what is Newton’s first law of motion?
an object at rest will stay at rest, and object in motion will stay in motion at a constant speed unless acted upon by an unbalanced force
what’s Newton’s second law of motion?
The acceleration of an object depends on the mass of the object or the amount of force applied
what is Newton’s third law of motion?
Every force has an equal and opposite reaction force, the 2 forces are not acting on the same object
To put forth as strength or make a great effort at something
Exert
Quantity that has size/direction
Vector
Used when asking about how powerful something is, it’s size
Magnitude
Push or pull
Force
SI base unit for force
Newton
Overall force acting on an object when all of the forces are combined
Net force
how hard it is to change the speed or direction of an object’s motion
Inertia
The force of attraction between objects that is due to their masses
Gravity
Path object takes in space as it moves around another object due to gravity
Orbit
Any force that keeps an object moving in a circle
Centripetal
Force of gravity on an object
Weight
To attempt to stop; resist
Oppose
Force that opposes motion between 2 touching surfaces
Friction
Substance that can flow easily; gas/liquid
Fluid
Force that opposes motion through fluid
Fluid Friction
A substance that will reduce friction
Lubricant
Force in an object that resists stretching/pressing
Elastic force
Force that stretches an object; force transmitted through a stretched object
Tension
Process of pushing particles of a material closer together
Compression
what is gravity?
1/3
force of attraction between 2 objects in the universe
