59 Multiple choice questions
- equation for Newton's second law of motion
- An object that remains at rest within earth's gravitational field is said to be in ____ _______.
that states that the orbit of every planet has the shape of an ellipse
and that the two foci of each planetary orbit are relatively close
- law that states that every action has an opposite and equal reaction
- term for any push or pull on an object
- term for the science of mechanics that seeks to explain motion by describing its causes
- A body in motion tends to move in a ____ ___ at a constant ____.
- An object in ____ _____ is not easily tipped over.
that says that for any planet, the square of the period of revolution
is proportional to the cube of the average distance from the sun
- An object in ____ _____ can be overturned without changing the height of its center of gravity.
that says that as a planet gets farther away from the sun, the distance
traveled by the planet must shorten and the velocity must decrease
fundamental force that exists only between electrically charged bodies,
binds the electrons of an atom to the nucleus, and causes an atom to
resistance the penetration of its space by another atom
weakest of the fundamental forces that exists between any two bodies of
matter; attracts, but does not repel; and holds the moons, planets, and
stars in their orbits
for the state in which an object's center of gravity is unsupported,
and the point where the force of gravity is effectively applied is free
to move in the direction of the applied force
- term for the farthest position from the sun in a planet's orbit
- Johannes Kepler's three laws of planetary motion
have sought to remove the mystery from gravitation by imagining that
each object sets up a _____ ____ in which other objects are impelled to
move by a force in the object's surrounding space.
- term for the force of a surface against the weight of an object
- term for the force exerted on an object's mass by the earth's gravity
- the simplest way of determining the center of gravity for irregular objects
- The _____ ("sun-centered") model of the solar system has become the foundation of modern astronomy.
- True or False: Kinetic friction is dependent on velocity.
- term for an object's resistance to sliding
- A body at rest tends to stay at rest, unless acted upon by an outside ___.
- the four fundamental forces of nature (from strongest to weakest)
- term for rest mass
- As the distance from the earth's center of mass increases, ____ diminishes.
- term for the science of mechanics that seeks merely to describe motion by describing its causes
- ____ is caused by unbalanced forces acting on the same object.
- term for an object's resistance to start sliding
- term for a body's tendency to maintain its velocity, or a resistance to any change in velocity
law that states that a body in motion tends to move in a straight line
at a constant speed, and a body at rest tends to stay at rest, unless
acted upon by an outside force
- the strongest of the four fundamental forces that holds an atomic nucleus together
- two fundamental forces that might be basically different expressions of the same force
- An object in ____ _____ is upset at the slightest disturbance.
- term for the point in an object that describes the combined effect of all the individual particles of mass
- term that means "earth-centered"
- term for any part of a machine that supports a moving part
- term for the one spot that represents the combined effect of gravity's influence on all the particles in an object
- sixteenth century Polish astronomer who proposed that sun was the center of the solar system
- True or False: Rough surfaces produce more friction than smooth surfaces.
- term for the closest position to the sun in a planet's orbit
for the force that acts against every object in motion in the opposite
direction to slow it down, or the resistance arising when an object
moves through a medium or across a surface
- Forces always occur in action-reaction ____.
- True or False: Kinetic friction is dependent on the area of contact between the surfaces.
that states that the same kind of force exists between any two masses,
regardless of size; specifically, that they are mutually attracted by a
force governed by the proportionality
- two types of friction
- four methods of reducing friction on a surface
- term for the attractive force that exists between any two masses
- the fundamental force responsible for certain particle interactions in the radioactive decay of atomic nuclei
- term for the time required for any planet to complete one orbit about the sun
- term for the acceleration of an object in free fall (the gravitational force per unit mass)
- Action and reaction are always opposite, equal, and along the same ___.
- Kinetic friction on a horizontal surface is proportional to the ____ of the moving object.
- Greek astronomer who created a geocentric model of the solar system in the second century A.D.
- equation for weight
- True or False: 'Gravitation' and 'gravity' do not mean the same thing.
- book by Isaac Newton that presented three laws of motion that still serve as the conceptual foundation of physics
- The normal force always acts _____ to a surface.