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Created by

Himal Shakya

Cards (46)

Acceleration
Rate of change of velocity of object respect to time

A = v-u/t m/s^2
or
A = Fnet/m
Displacement
S = Change in placement from the original point
What is distance?
d = total amount traveled
What are the 4 fundamental forces in physics?
1. Gravitational
2. Electromagnetic
3. Strong Nuclear
4. Weak Nuclear
What do the fundamental forces in physics govern?
They control how objects/particles interact and how certain particles decay.
What are contact forces?
Forces that act when two objects are touching

Applied
Spring
Drag
Frictional
Normal
What are non-contact forces?
Forces that act without the need for two objects to be touching

Examples
Magnetic
Electric
Gravitational
What is the SI unit for a force 
International system of units

(N) - one Newton is the force required to accelerate a mass of 1kg at 1m/s
What is an electromagnetic force?
The attractive or repulsive force between electrically charged particles and magnets
What is a strong nuclear force?
The force responsible for holding atomic nucelli together. It is incredibly powerful however only acts over a very short distance, binding protons and neutrons within the nucleolus of the atom.
What is weak nuclear force?
The force responsible for radioactive decay - it occurs within processes such as betta decay where a neutron transforms into a proton, emitting both a betta particle and neutron.
What is normal force?
The upward force exerted on an object to support its weight.
What is the center of mass?
The center of mass is an imaginary point around which an object's mass is balanced - e.g. hips on humans.
How do we draw a force diagram 
Arrows are drawn = force radiating outward from the center of mass of an object

Length of Arrow = strength of force
What are unbalanced forces?
Forces that are unequal and result in motion
Newton's first law
Law of Inertia = Object will remain stationary unless acted on by unbalance force
Newton's third law
Every action has equal and opposite reaction
What is the SI unit for motion?
Kgms
Newton's second law
Force of object = rate of change in momentum

F = m (v-u)/t or F = ma
Define Mass 
Mass is a measure of the amount of matter in an object.
What is mass measured in
kg
Weight
Measure of gravity (force) acting on an object in Newtons (N)

W = mg
What is proportional in a change in speed when falling? 
The change in height
Potential Energy
Stored up energy in stationary object

Ep = mgh
Kinetic Energy
Energy of object in motion

Ek = 1/2 mv^2
Work
Work = Gain in potential energy

W = Force x Distance
W = FD
What is the law of thermodynamics?
When energy passes into or out of a system, the systems internal energy changes in accordance with the law of conservation of energy
What are the two variations of data sets
Qualitive and Quantitative
What is qualitative data? 
Data sets that are not numerical where you must explore the content to work towards a generalized description that serves to determine whether the data is consistent with criteria
What is quantitative data?
Data that can be counted, usually given as numbers and used to provide a numerical analysis
What are three key factors that you can look at in graphs?
If the numbers represented are proportional. if the R^2 value = 1 and the y-intercept is basically 0
What is speed measured in?
Metres per second (m/s)
What is a force? 
A force is a push or a pull - (N)
What is velocity? 
Speed in a given direction - ms/s^2
What is mass? 
A measure of the amount of matter in an object - kg
Energy
The ability to do work
Power
Power = rate at which work is done.

P = W/t
Momentum
p = Motion of an object

Momentum has velocity = vector
Initial velocity
Velocity of object before undergoing acceleration

U = V - at or U = v^2 -2as
Final velocity
Velocity of object after undergoing acceleration

V = u + at or V = u^2 + 2as