Physics 1015
If you carry a heavy bag of groceries and bang your head against the wall, the concept that best explains why your head hurts is
inertia
A glance at the speedometer on your vehicle will tell you your
instantaneous speed
When a ball increases in speed by the same amount each second, its acceleration
is constant
A falling object that has reached its terminal speed continues to gain
none of the above
Inertia is defined as a
property of matter
The two measurements necessary for calculating average speed are
distance and time
When a crate slides down an incline at a constant velocity it is in
dynamic equilibrium
The unit kilowatt-hour is a unit of
energy
Success in science is mainly linked to emphasis on
experiments
The scientific method is most effective in
gaining, organizing, and applying new knowledge
According to Newton, the greater the masses of interacting objects, the
greater the gravitational force between them
Science is a body of knowledge that extends back to
humankinds beginnings
An outcome of universal gravitation is that
all of the above
A ball rolling down an incline has its maximum potential energy at
the top
The conservation of momentum is most closely related to Newton's
third law
Which has zero acceleration?
-an object at rest -an object in mechanical equilibrium -an object moving at constant velocity
When dishes remain on a table when you yank the tablecloth beneath them, you're demonstrating
Inertia
A dropped ball gains speed because
a gravitational force acts on it
If gravity between the Sun and Earth suddenly vanished, Earth would move in
a straight-line path
In science, theory is
a synthesis of a large body of well-tested knowledge
Technology is mainly
a tool of science
When you step off a bus moving 2 m/s, your horizontal speed when you meet the ground is
about 2 m/s
Newton's second law focuses on
acceleration
A falling object that has reached its terminal speed doesn't continue to gain
acceleration or speed
A kilogram is a measure of an object's
mass
Between mass and weight, the more fundamental quantity is
mass
The language of science is
mathematics
In science, facts
may change
Science is concerned mainly with the
natural world
As a bowling ball that rolls off the edge of a table falls, its horizontal component of motion
remains constant
the net force on an object is
the combination of all forces acting on it
Newton discovered that gravity is
univeral
Acceleration and velocity are
very different from each other
the quantity that most relates to the size of an object is
volume
Inside a freely-falling elevator your
weight is zero
Your weight is defined to be the force
you exert against a supporting aurface
The force required to maintain an object at a constant velocity in free space is equal to
zero