Test Flashcards
When determining distance and location use
reference points
reference point
a distinct location or object that is then compared to another location
SI Unit
international system of units
displacement
the change in position from the reference point
Displacement is measured with
no direction
Speed
the distance traveled during a specific unit of time
Velocity
the displacement of an object during a specific unit of time
What is the formula for speed?
s=d/t
What is the formula for velocity?
v=final time - initial time/t
Force
push or pull
Vectors
a drawing whose size and direction represent the magnitudes and direction of the forces acting on the object
What is the abbreviation for force?
fp
normal force
fn
friction
ff
gravity
fg
net force
the sum of all of the forces acting on an object
Forces that act in the same direction
combine (add)
Forces that act in opposite direction
counteract (subtract)
balance force
when forces acting in opposite directions are exactly equal
unbalanced force
when forces acting in opposite directions are unequal
contact forces
friction, elastic, and air resistance
field forces
gravity, electrical, and magnetic=
When the force of gravity and the force of air resistance are equal and the acceleration is zero
terminal velocity
If you increase the distance, the gravity will….
decrease
If you increase the mass and weight, the gravity will….
increase
friction
the force that has two surfaces exert when they run against each other
projectile motion
anything that is thrown in the air
Newton’s First Law
an object at rest well stay at rest will stay at rest unless acted on by an unbalanced force
Newton’s Second Law
the rate of change of an object is directly proportional to the force applied that the net force on an object is equal to the mass of that object multiplied by the acceleration
Newton’s Third Law
for every action there is an equal and opposite reaction
inertia
property of an object that describes how much it will resist change to the motion of the object
acceleration
a change in velocity, slowing down, and change in direction
