Topic 6 Flashcards
What is the equation for the kinetic theory, what do the symbols represent and what are their units
Ek=1/2mv^2
Kinetic energy = half mass times velocity squared
Jules = kg*m/s
What is an elastic collision
When kinetic energy is conserved in a collision
What is an inelastic collision
When kinetic energy is not conserved, some is lost
When doing particle equations what is v
The speed of light 3*10^7 m/s
What is the impulse equation, and what do the symbols represent
Impulse=F*Δt=Δρ
Ns = N*s = kgm/s
What do you always use in vector questions
Trigonometry mostly with kinetic energy or momentum
What is the relationship between Kinetic energy and momentum
Ek=1/2mv^2
mv=ρ
What is a radian
θ=2πr/r OR θ=s/r
radian = length of arch / radius of arch
What is angular displacement
The vector measurement through which something has moved
What is positive what is negative in circular motion
Clockwise = negative Anticlockwise = positive
What is one π radian in degrees
What is one radian in degrees
180°
How to convert degrees into pi radians with example
E.g
30° * π/180 –> (cancel the 0) 18/3=6 –> (answer) π/6
75° * π/180 –> 75π/180 (divide both tops by 5) = 15π/36 –> (divide both again by 3) = (answer) 5π/12
What is angular velocity
The rate at which angular displacement changes
What is the symbol for angular velocity
ω Lower case omega
What is the equation for angular velocity, give their units
ω=θ/t
rads/s = rads / s
