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Science Gavin Alveti
Terms in this set (71)
Newton's First Law
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
non-moving point from which motion is measured
An object's change in position relative to a reference point.
needed to determine the position of an object
describes how far an object has moved
SI unit for length or distance
shorter distances are measured in
when you want to convert inches to centimeters multiply by
when you want to convert centimeters to inches multiply by
the distance and direction of an object's change in position from a reference point
rate of motion and distance traveled per unit time
SI unit of time
the speed of an object at one instant of time
total distance divided by total time
to determine direction you need to know the
Speed in a given direction
can change even when the speed is constant
equation for speed
speed = distance/time
equation for time
equation for distance
speed x time
rate of change of velocity
Acceleration occurs when
An object changes its speed, direction, or both.
acceleration is indicated on a graph by what
changing slope =
rate of motion and distance traveled per unit
speed at a given instant
total distance/total time
the rate of change of velocity
an object slowing down is
acceleration has direction just like
if the acceleration is in the same direction as the velocity, the speed increases and the acceleration is
If the speed decreases, the acceleration is in the opposite direction from the velocity, and the acceleration is
equation for acceleration
a roller coaster starts down a hill at 10 m/s. Three seconds later, its speed is 31 m/s. What is the roller coaster's acceleration?
How long will it take a car traveling 30 m/s to come to a stop if its acceleration is -3 m/s2?
what is gravity
what is a force
A push or a pull
Equation for force
what is mass measured in
kg or grams
what is acceleration measured in
Does force always change velocity?
unbalanced forces that are not opposite and equal
When two or more forces act on an object at the same time, the forces combine to form the
the tendency of an object to resist any change in its motion
The greater the mass of an object is, the greater its
increases as mass increases
true or false a net force causes motion
false a net force causes a CHANGE in motion
A force that opposes motion between two surfaces that are in contact
Three types of friction
static, sliding, rolling
friction is greater
between rough surfaces
formula for kinetic energy
formula for potential energy
weight x height
formula for work
work = force x distance
formula for power
the frictional force that prevents two surfaces from sliding past each other.
the force that opposes the motion of two surfaces sliding past each other.
the frictional force between a rolling object and the surface it rolls on.
force that air exerts on a moving object to oppose its motion
air resistance depends on
speed, surface area, shape, and density of fluid
maximum velocity reached by a falling object
What force would be required to accelerate a 40 kg mass by 4 m/s2?
A 4.0 kg shotput is thrown with 30 N of force. What is its acceleration?
Mrs. J. weighs 557 N. What is her mass?
Recommended textbook explanations
Paul G. Hewitt
Jerry S. Faughn, Serway
Paul G. Hewitt
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