Newton's 1st Law
What is inertia have a relationship with?
Mass
The greater the force, the greater the ________?
Acceleration
What results from an action?
an equal and opposite reaction
Friction is a force that opposes the relative _____ between two objects in _______
Motion; Contact
Balanced forces produce a net force of ____
To change how something moves, you need an ________ force
Accelerating/ unbalanced
What is the formula for force?
Force=Mass x Acceleration
For every action, there is an _____ and _______ reaction
equal; opposite
What fundamental force does friction result from?
Electromagnetic force
True or false? An object will stay at rest if the forces are unbalanced
False
What is the definition of Newton's 1st Law of Motion?
An object's motion will not change until an unbalanced force acts upon it.
What is the definition of Newton's 2nd Law of Motion?
Acceleration is directly proportional to force and is inversely proportional to mass
What is the definition of Newton's 3rd Law of Motion?
When one body exerts a force on another body, the second body exerts a force back on the first that is equal and opposite.
What are the 2 main types of friction?
Kinetic and Static
The net force is the ___ of the total forces
sum
A non-zero net force will _____ the velocity
Change
What direction will an object accelerate?
The direction of the net force
If someone punches a wall, what would supply the opposite reaction of force onto the person's hand?
the wall
What 3 factors affect the amount of friction?
Surface area, surface roughness, and the force acted upon the surfaces
What happens when an object's net force is greater than zero?
The object will accelerate
Explain why throwing an apple into the air in a moving vehicle results in the apple landing back into your hand
The apple is moving at the same speed as the bus
The greater the _____, the smaller the _________
mass; acceleration
True or False? If the Earth exerts gravity on the moon, then the reaction will result in the moon exerting the same amount of force onto the earth.
True
What piece of technology allows an object to move with reduced force by reducing surface area contact.
wheels
If a bicycle is moving across a road at a constant speed, are the forces in this situation balanced or unbalanced?
Balanced