Equations
What is the equation for Force?
F = ma
How is every object drawn?
Box, Square, rectangle.
What are forces measured in?
Newtons
What is Newton's First Law?
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
How do you find acceleration given Force and mass?
a = F/m
All vectors must be drawn with _____. All vectors should be ________.
Arrows
Proportional
Gravity is _______.
Constant
What is another name for Newton's First Law?
The Law of Inertia
How do you find Net Force?
By adding together the vertical forces, and then adding together the horizontal forces. NEVER add a vertical force with a horizontal force.
How are surfaces shown?
Flat Lines
List 5 different forces.
Gravitational, Normal, Applied, Frictional, Air Resistance.
What is Newton's Second Law?
The acceleration of an object depends upon the net force and the mass of an object.
What is the equation for friction? The coefficient of friction?
FFrict = mu * FN
mu= FFrict / FN
What are the correct labels for Gravity, Normal Force, Applied Force, Friction, and Air Resistance
Gravity: Weight, W, FG
Normal: N, FN, Normal, Reaction Force
Applied: FA, Applied Force
Friction: FFrict
Air Resistance: Air Resistance
What is Net Force?
All the horizontal forces added together and all the vertical forces added together. If there is no net force, there is no acceleration.
What is Newton's Third Law?
For every action, there is an equal and opposite reaction.
If there is no vertical acceleration, how can you find normal force given only gravity?
If there is no vertical acceleration, then normal force and gravity should be the same. No net force, no acceleration. There is no vertical acceleration, so there should be a net force of zero.
Where should the vector for "Weight" always be drawn from?
The middle of the box with the arrow going downward. Gravity is always pushing the middle of an object.
What is a balanced force? An unbalanced force?
When two forces are of equal magnitude and in opposite directions, they balance each other, creating a balanced force. When two forces are not equal in magnitude, they do not balance each other out, so they create an unbalanced force.
A person is standing on the ground. Using Newton's Third Law, why aren't the ground or the person moving?
The person is pushing down on the ground and the ground is pushing the person up. Neither the person nor the ground is moving because they are both pushing with equal force. No net force, no acceleration.