Forces
A push or pull on an object
What is Force?
In object in motion stays in motion unless acted upon by another force?
What is Newton's First Law
The force of a 2 kg object accelerating at 3 m/s^2
p=mv
What is the formula for momentum?
What did Benjamin Franklin do on April 17, 1790?
What is Die?
Two main categories of forces
Contact and non contact forces?
For every action, there is an equal and opposite reaction
What is Newton's 3rd Law?
A 50 N force impacts a 10 kg object, What is the acceleration of the object?
5 m/s^2
What is the momentum of a 10 kg bowling ball moving at a speed of 0.5 m/s
What is 5 kg m/s
General Lee's "right arm"
Who is Stonewall Jackson
Name a non contact force?
What is force of gravity, magnetism or electrostatic forces?
F=ma
What is Newton's Second Law
What is the mass of an object accelerating at 2 m/s and exerts a force of 6 N?
What is 3 Kg
2 m/s
2x-5 = 3
Solve for x
x = 4
Two factors that influence the force of gravity
The total momentum of a group of objects remains the same unless acted upon by outside forces
What is the Law of Conservation of Momentum?
A 1 kg arrow is launched with a force of 20 N. A tail wind exerts an additional 5 N of force to the area.
How fast does the arrow accelerate?
25 m/s^2
How fast must a 5 kg toy car go in order to have more momentum than a 100 kg cow moving 1 m/s?
> 20 m/s
Jo catches Fred cheating at what?
What is croquet?
The force that resists the motion of an object
What is friction?
All Objects that have mass are attracted to other objects with mass
What is the Law of Universal Gravitation?
acceleration due to gravity is 10 m/s.
You lift a 5 kg rock up with a force of 100 N
How fast is the rock accelerating?
What is 10 m/s^2
100N Up - 50 N down = 50 N Up
50N Up= 5 kg x A
10 = A
What has the greatest momentum:
A 1000 kg bus that is stopped or a 0.001 kg fly moving 1 m/s
The Fly
What is the origin of the phrase "Mad as a Hatter"?
Mad Hatter's Disease aka Mercury Poisoning