Motion
When is an object in motion
when its position changes
What is velocity?
an objects speed and direction
How many laws did Newton develop?
3
What is gravity?
a force that pulls objects down and attracts 2 objects with mass
Where do you experience gravity?
On Earth
What is motion?
a change of position
What can you learn from an objects velocity?
its speed and direction
Which law is this: inertia is the tendency of an object at rest to stay at rest and an object in motion to remain in motion at a constant velocity
Newtons 1st law
What is friction?
a force that resists the movement of one surface against another
What is an example of a force?
Shoving a friend or something, pulling something
How does motion effect speed?
What are forces?
They act on an object putting it in motion or making it move faster or stop
Where do you experience Newtons 1st law?
In a car
what is the equation for Newtons second law
force = mass x acceleration
What does the force of gravity depend on?
mass and distance apart
What is it called when an object has a tendency to stay at rest until forces act upon it?
inertia
When do forces act on objects ?
all the time
Newton's second law of motion states :
the unbalanced force acting on a object is equal to the objects mass times acceleration
Define a free fall.
when the only force acting on the falling object is gravity
What is an example of a free fall?
a large rock falling or a small rock falling
When you are in a car- all objects are in motion and matching the speed of the car? True or false
True
What are balanced forces?
When the combined force is a net of zero
Newtons third law states that for every action force there is an _________
equal and opposite reaction force
What vocabulary words apply to this video
speed
acceleration
friction
inertia
What is an example of Newtons 3rd law?
A rocket launching