What Are Forces?
What is force?
The amount of push or pull on an object.
Describe Newton's 1st Law
An object will stay in uniform motion unless another force acts upon it.
The rate at whichan object speeds, up, slows down, or changes direction over time is...
ACCELERATION
Give an example of light energy.
a campfire, a candle, a street lamp, etc.
A force that requires 2 peices of matter to touch.
Contact Force
The force that results when 2 materials rub against each other.
Friction
What is Newton's 2nd law of motion?
Force = Mass x Acceleration
Motion without acceleration is called...
Uniform Motion
Light travels in...
Waves
Gravity, elctric and magnetic forces are all examples of what?
Non-contact forces
Give an example of friction.
Brakes rubbing against a tire
(other examples would work)
According to Newton's 2nd law, why would it take more force to throw a bowling ball than a basketball?
THe bowling ball has a greater mass than the basketball.
What causes your body to push you against the side of a car when it turns?
Inertia
Explain how an object creates a shadow.
The object absorbs the light and blocks it from hitting another surface.
the tendency of an object to resist any change in motion is known as...
Inertia
What is gravity?
The force of attraction between any 2 objects.
When one object exerts force on a 2nd object, the 2nd object exerts and equal and opposite force
It would move/fall over.
The farther a light is from its source, the ________ the object's shadow will be.
2 forces of equal strength that combine to act on the same object but in opposite directions are...
Balanced
What would cause a crumpled piece of paper to fall quicker than an uncrumpled piece of paper?
Air resistance
A block with a mass of 13kg is being pushed at a rate of 5 m/s2. How much force is applied?
65 N
The total of all forces acting on an object is called...
Net force
The angle at which light strikes an object will effect the __________ of its shadow.
Size
An area of partial darkness where light has been blocked by an object is called its...
Shadow