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Physics 30 Principles
Transcript of Physics 30 Principles
Uniform circular motion is a movement of an object along the circumference of a circle or rotation along a circular path with a constant velocity.
A ball swinging around a post.
A satellite in orbit.
v = d / t = 2•pi•R / T = frequency • 2•pi•R a = v2 / R
Conservation on Momentum
The conservation of momentum is a law that states that total momentum will be constant regardless of other changes in a system.
Conservation of Mass Energy
Conservation of Energy
Conservation of Charge
Conservation of Nucleons
Wave Particle Duality
The uniform motion according to Newton's first law, a body with force acting on it will continue to move with uniform speed unless acted upon by another force.
df-di= change in d
change in d= average velocity x change in time
If an object is sitting on the ground and is stationary then the forces are balanced.
If an object slides on a frictionless surface it will not stop unless something stops it.
Uniformly accelerated motion is when the acceleration of an object is constant and the velocity is constantly changing.
F=ma a= v/t F=mg
An object falling will accelerate at 9.81 m/s2
If you roll an object it will decelerate with a constant velocity because of friction.
Ek = 1/2 mv2
The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy: W = ΔK. Work done on an object by a net force equals the change in kinetic energy of the object.
P = mv
P = W/t
The law of conservation of energy states that the total energy of an isolated system cannot change but is conserved over time.
Ek = 1/2 mv2
Ep = mgh
Ek = Ep
This refers to the mass-energy equivalence where mass converting to energy at the speed of light is always conserved.
E = mc2
Energy = mass x velocity square
where, c is the velocity of light.
charge cannot be created or destroyed but can only be transferred from one object to another or it can be separated or polarized within an object.
The law of Conservation of Nucleons states that the sum of protons and neutrons before and after a nuclear reaction will be the same.
Wave particle duality is a theory that proposes that EMR acts as both a wave and a particle.
A 15.0kg box is lifted at a constant velocity 1.5m. How much work is done on the box?