PHYSICS 150 Exam Questions with Correct Answers.
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.
what is the velocity if there is no force?
constant
static equilibrium
an object at rest with no net force
net force
The sum of all forces acting on an object
scalar
a physical quantity that has magnitude but no direction
vector
A quantity that has both magnitude and direction
if an object is at rest what is the net force?
zero
support force
The force that supports an object against gravity
force of gravity
, weight
units to measure force
Newtons
units to measure weight
pounds
tension
pressure
tension at constant velocity
doesn't change
friction force
the force resisting the relative motion of solid surfaces, fluid layers, and material elements
sliding against each other
static friction
Friction that acts on objects that are not moving
sliding and rolling friction
from contact of moving objects
dynamic equilibrium
a state of balance between continuing processes
applies in states of constant, non-zero velocity
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.
what is the velocity if there is no force?
constant
static equilibrium
an object at rest with no net force
net force
The sum of all forces acting on an object
scalar
a physical quantity that has magnitude but no direction
vector
A quantity that has both magnitude and direction
if an object is at rest what is the net force?
zero
support force
The force that supports an object against gravity
force of gravity
, weight
units to measure force
Newtons
units to measure weight
pounds
tension
pressure
tension at constant velocity
doesn't change
friction force
the force resisting the relative motion of solid surfaces, fluid layers, and material elements
sliding against each other
static friction
Friction that acts on objects that are not moving
sliding and rolling friction
from contact of moving objects
dynamic equilibrium
a state of balance between continuing processes
applies in states of constant, non-zero velocity
