Forces
A force is defined as a ______ or _______
push or pull
The object always moves in the direction of the _________ force.
greater
An object in motion will stay in ____________ unless acted upon by another _____________.
What is Newton's second law
F=MXA
State Law 3
For every action there is an equal and opposite reaction.
This force pulls downward.
gravity
When an object moves it is because the forces are ____________.
unbalanced
An object at rest will stay at _________ unless acted upon by another ____________.
rest, force
If the force is 45 Newtons and the acceleration is 9 m/s/s what is the mass?
5kg
How is a bird an example of Law 3
Action; Bird flaps wing and wings push air
Reaction; The air pushes back at the bird and moves the bird forward.
Name two forces besides gravity and pushes or pulls.
Friction pressure
This type of friction is used by Hockey Players.
Sliding
Newton's 1st Law is also known as _______________.
The law of Inertia
If an object is 10kg and moves 5 m/s/s, what amount of force is being exerted?
50N
How is a squid an example of Law 3
Action; The squid suck in water
Reaction; The squid squirts out water propelling it forward.
Name the three types of friction.
sliding, rolling, fluid
This type of friction is used to fix a squeaky door
Fluid
Why does a ball fall to the ground if an object in motion stays in motion?
gravity
When is more force required to move an object?
More mass
How is a rocket an example of law 3
Action; Gasses push against the earth
Reaction; The earth pushes the gasses up and lifts the rocket.
When an object is at rest it has _____________
forces.
balanced
Forces can cause objects to do three things.
stop, change direction, move
Give an example of Newton's 1st Law
Throwing a baseball.
How does mass affect acceleration?
Can speed it up or slow it down.
If I exert 15N of force on a door how much force does it exert back upon me
15 N