chapter 11 test
when the net force on an object is greater than BLANK the object will accelerate in the direction of the greater force
0
what is an example of balanced forces acting on an object
a person standing on the ground
The distance traveled by an object divided by the time it takes to travel that distance is called?
average speed
because of the speed of an object can change from one instant to the next, dividing the total distance covered by the time of travel gives
average speed
on a distance vs. time graph, distance is usually the
dependent
The difference between speed and velocity is that velocity includes
direction
velocity describes both speed and
direction
the change in the position of an object is called
displacement
On a distance vs. time graph, the line of an object at rest is a
flat line with a slope of zero
Friction is defined as the
force that opposes motion between two surfaces that are touching
which is an example of kinetic friction
friction between a car's windshield and the air as you drive into the wind
the force of gravity, electromagnetic force, the strong nuclear force, and the weak nuclear force are examples of
fundamental
Force is a quantity made up of
magnitude and direction
the combination of all forces acting on an object it the
net force
one way to reduce friction in a car engine is to add an
oil
static friction is usually greater than BLANK friction
rolling and sliding
acceleration can be determined from a velocity vs. time graph by calculating the lines
slope
an object is in motion
the object changes position relative to a frame of reference
Acceleration is defined as the change in velocity divided by
time
An example of helpful friction is
writing on paper with a pen