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Acceleration, Forces, and Gravity
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Gravity
Terms in this set (33)
Acceleration
a change in velocity
m/s2
unit for acceleration
velocity
speed in a given direction
m/s
unit for velocity
Formula for acceleration
acceleration = (Final velocity - Initial velocity)/Time
Force
push or a pull
Newton (N)
unit of force
Net Force
total of all forces on an object
Unbalanced Forces
cause a change in an object's motion
Balanced Forces
net force is equal to zero
Inertia
Object's resistance to change
Friction
two surfaces exert on each other when they rub against each other
Gravity
force that pulls objects toward each other
Mass
amount of matter in an object
Weight
force of gravity on an object
Free Fall
when only gravity is acting on an object
Air Resistance
objects falling through air experience this fluid friction
Projectile
object that is thrown
Newton's First Law of Motion
an object at rest stays at rest or an object in motion stays in motion unless acted on by an outside force
Newton's Second Law of Motion
acceleration depends on the object's mass and force (F=ma)
Newton's Third Law of Motion
For every action there is an equal and opposite reaction
Gravity will change with...
distance and mass
Acceleration of an object...
decreases when mass increase
increases when force increases
is in the same direction as the force on an object
Acceleration of Gravity
9.8 m/s2
The closer two objects are the...
stronger the gravity
The larger a mass is
the more gravity and inertia it has
Formula for weight
weight = mass x gravity
Friction moves in the...
opposite direction of a sliding object
At a constant speed
all forces are equal (balanced)
Formula for force is...
Force = mass x acceleration
The bigger the mass,
the bigger the gravity
For Newton's 2nd law, if you increase force you also increase...
acceleration
Which has the most inertia - a car, a speeding bullet, a bowling ball
car - it has the largest mass
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