Newton's 1st Law
What does Newton's 1st Law of Motion state?
An object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by an outside force.
What does Newton's 2nd Law of Motion state?
Force = Mass x Acceleration
What does Newton's 3rd Law of Motion state?
Every action has an equal and opposite reaction.
This property is the amount of matter an object is made of.
Mass
In Free-Fall, what is the ONLY force acting on an object?
Gravity
What is the name of the property that determines how how likely something is to continue moving, or to continue being at rest?
Inertia
If when I increase X, Y decreases. What proportionality are they to each other?
Inversely proportional.
What are the two forces involved in a Force Pair?
Action Force and Reaction Force
Does mass change based on location?
No
What is the value on Earth for the "acceleration due to gravity" (g)?
10 m/s^2
Inertia is measured in terms of _________?
Mass (in kilograms(kg))
Are force and acceleration directly proportional or inversely proportional? What happens to my acceleration if I decrease my force?
They are directly proportional. If I decrease the amount of force, the acceleration decreases.
If I push on a wall with 500N of force, how much force does the wall push back on me with?
500N
What are the two types of units the force of Weight can be measured in?
Newtons(N) (used for most of our work in physics)
Pounds(lbs) (used by us in the USA)
What causes falling objects to slow during Non-Free Fall?
Air Resistance
If an astronaut throws a rock in space, what will happen to that rock according to Newton's 1st Law?
The rock will continue forever in the direction thrown at a constant speed. (Unless another force comes into contact with it)
Are mass and acceleration directly proportional or inversely proportional? What happens to my acceleration if I increase my mass?
They are inversely proportional. If I increase the amount of mass, the acceleration decreases.
If the action force was that a fist exerted a force onto a wall, what would the reaction force be?
The wall exerting a force back onto the fist.
What is the equation to find Weight?
Weight(N) = mass(kg) x acceleration due to gravity (m/s^2)
What is the only place we have learned of where Free Fall can be achieved on Earth?
In a vacuum chamber (where all the air is taken out)
Choose a team member to come up and use Newton's 1st Law to place a penny in the cup without touching the penny. Explain why the penny is able to do this?
The penny has inertia, so since it is at rest it wants to remain at rest.
If a 25kg object has an acceleration of 5m/s^2, what is the object's Force (in Newtons)?
125N
What has a greater force? The Earth pulling on a dog due to gravity, or a dog pulling on the Earth due to gravity?
The forces are equal
What is the weight of a 47kg object on Earth?
470N
If I drop an 800kg object and a 5kg object from the same height in Free Fall, which will hit the ground first?
They will hit the ground at the same time