Flash Cards

# Forces Test SG

force that pulls objects towards each other gravity
product of an object's mass & velocity
transfer of energy from one object to another
momentum
tendency of an object to resist any change in motion inertia
Newton's first law states, "An object in motion will continue in motion." Why does an object stop? friction& gravity
What is the net force of a balanced force? 0
What is the net force of an unbalanced force greater than 0
WHat is the difference between weight and mass? mass- balance
weight- gravity
Why does mass not make a difference in free fall? all accelerate at the same rate regardless of mass
How does gravity affect objects that are moving horizontally? objects will hit the ground at the same time
(pulls objects down)
How is mass related to inertia more mass greater inertia
How is mass related to momentum? the more mass
more momentum
What happens to the momentum of 2 objects after they collide? energy is absorbed or transferred from one object to another
What acceleration does all objects free fall? 9.8 meters per second squared
32ft. per sec. squared
occurs when a solid object moves through a fluid
Examples- surfing& swimming
fluid friction
friction that occurs when one solid surface slides over another
examples- iceskating skiing
sliding friction
friction that acts on objects that aren't moving
examples- cup table
static friction
when an object rolls across a surface
examples- bicycle skateboards
rolling friction
Newton is perhaps most famous for what? three laws about objects in motion and the forces that act on them
Newton's work wrote them and called them what? Newton's laws of Motion
Newton's first law f motion concerns inertia
objects that are still remain still
objets that are moving continue moving with a constant velocity
Newton's second law concerns acceleration
A bowling ball is more difficult to do what than a tennis ball throw
Newton's third law of Motion is what the motion of action and reaction
when you hit a baseball with an aluminum bat the ball has another equal and opposite reaction
Inertia lab pennies
Acceleration depends on he object's mass and on the net force acting on it
An object moving at a contsant velocity will continue moving unless acts don by an unbalanced force
if one object exerts the second object exerts force of equal strength in the opposite direction on the first object 3rd law
mass times velocity = momentum
the equation for newton's second law is… forces= mass times acceleration
golf ball lab 3rd law-momentum
Momentum equation is… mass times velocity = momentum
golf ball lab newton's 3rd law
rocket lab newton's second law