Forces Flashcards
What is a force
A push or pull on an object
What are torques
Forces that bend, twist and stretch
What do forces cause?
Linear acceleration
What are the four universal forces?
Electromagnetic force
Weak force
Strong nuclear force
Gravitational force
What is the electromagnetic force
1) Gives matter its strength, ability to bond, etc
2) Prevents objects from occupying the same space at the same time
3) electricity, magnetism and light are related
4) particle is the photon
What is the weak force
1) the cause of radioactive decay
2) involves the interactions of neutrinos
3) particle is the boson
*photon & Bosons are related. Have different properties due to the Higgs Field.
Electroweak theory 1979
What is the strong nuclear force
1) force that holds the particles of the nucleus together
2) force is very strong but only in the space of a nucleus (10^15)
4) particle is the gluon
What is the gravitational force
1) force that pulls objects together
2) the weakest of the forces
3) gravity is the indentation of the fabric of space-time
4) the particle is the graviton. Has not been found
5) newtons universal gravitational force.
- Fg= Gm1m2/r^2
What is the grand unification theory
All forces are just part of one main force
What is a net force
1) all the forces acting on an object added together
Force is a what? Which means
Force is a vector which means you add in the same direction and subject in the opposite
If the net force is > 0,
The object will accelerate in the direction of the net force.
What are balanced forces
1) forces acting on an object produce a net force of 0
2) inertial object
What are unbalanced forces
1) forces acting on an object produce a net force of < or > 0.
2) the cause of all acceleration
What is the 1st law of motion
1) an unbalanced force is needed to change the state of motion of an object
2) will move in a straight line continuously
3) inertial object
4) mass is the only quantity effecting inertia
What is an inertia object
Has the tendency to remain in its current state of motion
What is the 2nd law of motion
1) force of an object is directly proportional to the mass and its acceleration
2) F=mXa
3) a= F/m
What is newtons 3rd law of motion?
For every force acting on an object, that object exerts an equal force in the opposite direction
Friction
Force between 2 objects in contact that slows down either object
air restistance a form of friction
2 types of friction
Static- opposes the start of acceleration
Sliding - opposes the continual motion of an object
Center of rotation
Point around which all the quantities of rotation are defined
- velocity , acceleration
