Term 1 Formulars Flashcards
What is Newton’s first law
The law of inertia
Newton’s second law
F=ma
Newton’s third law
Action and reaction
F=ma
Second law
Hookes law
F=kx
K in hookes law
How easy/hard it is to stretch the spring
X in hookes law
The spring extension
T=Fd
Torque
Acceleration in circular motion
Ac=v^2/r
Fc=mv^2/r
Centripetal force
Unit of p=mv
Kg.ms
Impulse formula
F.t
F.t=____=_____
Change in momentum, mv-mu
Psystem before =
Psystem after
Km/h^-1 To ms^-1
Divid by 3.6
5 scalar quantity
Time,speed,mass,weight,pressure,energy
5 vector quantities
Velocity,distance,force,momentum,displacement,acceleration
What is vector quantity
Magnitude,direction
What is Scalar quantity
Just magnitude
Different between average speed and velocity
Velocity can have negative distance
A=change in velocity/time
Acceleration
What is the gradient in a speed graph mean
Velocity
What does the gradient in velocity graph mean
Acceleration
What does the area in velocity graph mean
Displacement
change in y/change in x
Is gradient
If you have u,t,a and try to find out s what is the equation
S=ut+1/2at^2
First suvat equation
V=u+at
What is the equation for v^2
V^2=u^2+2as
What is the suvat equation 4
S=1/2(u+v)t
Equation 4 of suvat
S=1/2(u+v)t
The conversation of momentum in words
The total momentum of a system formed by any number of objects remains constant if there is no external forces acting on the system
Energy cannot be created or destroyed but it can be converted from one energy form to another
The conversation of energy law
Condition for the conservation law of momentum is
Net force is zero
Output/total input
Efficiency
Is Ep the same as Ek
True
Equation for density
Mass/volume or M/V
Density letter
P
Unit for density
Kgm^-3 or gcm^-3
1/2mv^2=
Ek
Ep formula
Ep=Mgh
Unit for Ek and Ep
Joules (j)
Power unit
Watts
P=W/t
Power
Work formula
W=fd
If the force and displacement is in opposite directions it’s
W=-Fd
Units for distance/displacement
Meter,kilometre,yards,miles,feet,light year
Units for time
Seconds,hour,years
Unit for mass
Kg,g
Unit for velocity/speed
Ms^-1 or m/s
Unit for acceleration
Ms^-2 or m/s^2
Unit for torque
N.m
Units for force
N
Unit for pressure
Pa,bar,atm,psi
Momentum unit
Kgms^-1
Velocity is facing _____ in circular motion
Tanget
Acceleration in circular motion is facing
To the centre
Equilibrium means
Net force is 0
Giga=
x10^9
Micro=
x10^-6
Hector=
x10^2
Deci=
x10^-1
Deca=
x10
Mega=
x10^6
Nano=
x10-9
Covert 1 nm to km
1/10^-12
Covert 1 Gm to m
1x10^9
Accuracy in data is
The closer it is the Theoretical value
Precision is
The closeness of the data points
