Module 5: Newton's Laws Flashcards
Define Friction.
A force that opposes motion, resulting from the contact of two surfaces.
Define Newton’s First Law (The Law of Inertia).
An objection in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force.
Define Newton’s Second Law.
When an object is acted on by one or more outside forces, the vector sum of those forces is equal to the mass of the object times the resulting acceleration vector.
Define Normal Force.
A force that results from the contact of two bodies and is perpendicular to the surface of contact.
Define Kinetic friction.
Friction that opposes motion once the motion has already started.
Define Static friction.
Friction that opposes the initiation of motion
What is the sum of forces equation?
ΣF = ma
ΣF —> Sum of forces
m —> Mass of object
a —> Resulting acceleration
What is the SI unit for force?
The Newton which is defined as a kg * m / sec2
What is the weight equation?
w = m*g
w —> Weight
m —> Mass
g —> Acceleration due to gravity
What do the units slugs, grams, or any prefix unit based on grams (mg, kg, etc.) refer to?
When a measurement is referred to in slugs, grams, or any prefix unit based on grams (mg, kg, etc.), the mass of the object is being reported
What do the units Newtons, dynes, or pounds refer to?
When a measurement is given in Newtons, dynes, or pounds, the weight of the object is being reported.
What is the Newton unit?
Newton: kg * m / sec^2
What is the Dyne unit?
Dyne: g * cm / sec^2
What is the Pound unit?
Pound: slug * ft / sec^2
The static frictional force can ___________________________________
The static frictional force can increase to counteract an increasing force which attempts to cause motion. Remeber, there is a maximum value that the static frictional force can reach
