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# 5-4,6 test

### 5-4,6-1 quiz

a force of attraction between objects that is due to their masses gravity
Can gravity change motion? yes
All --- is affected by gravity matter
Why don't you see all gravity? the mass of most objects is too small to cause large enough force to move objects
Earth has a --- gravitational force and if you overcome it, you must apply ---. large; force
Newton watched a falling ---. apple
Newton concluded that an --- force caused an apple to fall. unbalanced
The law of universal gravitation describes the relationships between ---, ---, and ---. gravitational force, mass, and distance
Describe the law of universal gravitation All objects in the universe attract each other through gravitational force.
Part I of LUG: Gravitational force --- as mass increases. increases
Part II of LUG: Gravitational force --- as distance decreases. decreases
a measure of gravitational force on an object weight
What is used to measure weight? spring scale
Are weight and mass the same thing? no
the amount of matter in an object mass
--- (mass or weight) doesn't change while --- (mass or weight) does. Mass; Weight
What is used to measure mass? a balance
Unit for force: Newton (N)
Unit for weight: Newton (N)
Unit for mass: Grams (g) or miligrams (mg)
Acceleration due to gravity is --- for all objects same
The force that opposes the motion of objects though air air resistance
What does air resistance depend on? size, shape, and speed
The constant velocity of a falling object terminal velocity
The motion of a body when only the force of gravity is acting on the body free fall
Free fall occurs where there isn't any ---. air
--- objects are in free fall. orbiting
An object is orbiting when... it is traveling around another object in space
The curved path an object follows when it is thrown or propelled near the center of the Earth projectile motion
What are the two components of projectile motion? horizantal and vertical motion
What is Newton's first law? An object at rest remains at rest, and an object in motion remains in motion at a constant speed and in a straight line unless acted on by ans unbalanced force
An object will not be in motion until they are --- or ---. pushed or pulled
Will objects moving at a velocity continue to move at that velocity? yes
An unbalanced force to act on a moving object could be ---. friction
The tendency of an object to resist any change in motion inertia
mass = measure of --- inertia
Changing the motion of an object with less mass is ---. easier
What is Newton's second law? The acceleration of an object depends on the mass of the object and the amount of force applied
What is the first part of Newton's second law? acceleration depends on mass
Mass decreases = acceleration --- increases
What is the second part of Newton's second law? acceleration depends on force
Force increases = acceleration --- increases
What is Newton's third law? Whenever one object exerts force on a second object, the second object exerts an equal and opposite force on the force.
All forces act in ---. pairs
Can you always see the effect of a reaction? no
A quantity defined as the product of the mass and velocity of an object momentum
p= momentum
What is the Law of Conservation of Momentum? any time objects collide, the total amount of momentum stays the same
When two objects stick together, they move as ---- object(s). one
When two objects bounce off of each other the momentum is transferred... from one object to another object
The Law of Conservation of Momentum is similar to Newton's --- law. third
Can momentum be gained or lost? no
Created by: kfran0112