Newton's Laws Flashcards
What is mass?
- A physical property of an object which describes how much matter it contains.
- A measure of inertia
- Resists change in motion (acceleration)
What is inertia?
The tendency of an object to resist a change in motion.
Define net force.
- The vector sum of all of the forces acting on an object.
- ∑F which causes mass to accelerate
What does a net force cause?
Acceleration in the same direction of the force.
What is weight?
The gravitational force acting on an object.
Solve for m
Fg = mg
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m = Fg/g
What is an object’s center of mass?
A point in an object through which its entire weight can be thought to act.
What is each force represented by in a free body diagram?
A labelled arrow, proportional to the size of the force.
What does “∑” mean in the following equation?
∑F = ma
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- Vector sum
- Add up all of the …
- Combine one dimension
- Net
What is friction?
The force that arises when two surfaces rub against each other.
What is this?
Ff
answer with as many connections as possible
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- Force of Friction
- = μFN
What is this?
Fg
answer with as many connections as possible
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- Force of gravity
- Weight
- = mass*9.8
- =mg
Solve for μ
Ff = μFN
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μ = Ff / FN
What is this?
μs
answer with as many connections as possible
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- mu
- coefficient of static friction
- describes the interaction of two surfaces while stationary
- increases from zero to max in response to a force until broken when the object starts to slide
What is this?
μk
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- mu
- coefficient of kinetic friction
- describes the interaction of two surfaces while sliding
True or False
“Fg” means F * g
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False
In Fg, the g is a subscript, which serves as a description
What is drag?
- The resistive force acting on an object that is travelling through a fluid.
- e.g. Fair
Define terminal velocity.
- When an object stops accelerating and has a constant velocity because the drag is equal and opposite to its weight.
What is tension?
- The force within a stretched cable or rope.
- e.g. FT or just T
What is this?
FN
- Normal force
- Responsive force of a surface pushing back on an object
- Perpendicular to surface
What do all objects with a mass exert?
A gravitational pull on other massive objects around them.
What is gravitational field strength?
The acceleration that an object experiences due to gravity.
What is the gravitational field strength close to the surface of the earth?
(G * MEarth) / rEarth2 = 9.81m/s/s
What does the following phrase mean?
constant velocity
- acceleration = 0 m/s/s
- forces are balanced
- ∑F = 0
What would you label this force?
- Normal force
- Responsive force of a surface pushing back on an object
- Perpendicular to surface
What is this?
FN
- The force within a stretched cable or rope.
- e.g. FT or just T
What is tension?
- Force of gravity
- Weight
- = mass*9.8
- =mg
What is this?
Fg
answer with as many connections as possible
Created by Colletti
What is the symbol for the following?
coefficient of static friction
What is this?
μs
answer with as many connections as possible
Created by Colletti
