Lecture 20 - Angular Kinetics : Finding the Centre of Mass Flashcards
the weight of the body is a function of the mass of …… and ..
mass of each particle and the acceleration due to gravity
the point around which all the particles are evenly distributed is
the point at which we can draw a single weight vector (Fw)
what is the unit for impulse
N.s
what is the unit for displacement
m
what is the unit for velocity
m/s
what is the unit for acceleration
m.s^-2
what is the unit for force
N
what is the unit for inertia
equivalent to mass
what is the unit for momentum
kg.m.s-1
what is the unit for angular displacement
rad
what is the unit for angular velocity
rad/s
what is the unit for angular acceleration
rad.s^-2
what is the unit for moment of force or torque
N.m
what is the unit for moment of intertia
kg.m^2
what is the unit for angular momentum
kg.m^2.s^-1
what is the unit for angular impulse
N.m.s
the centre of gravity is the point about which ….
the resultant torque of all forces acting on the body is zero
what is the quantitative method to locate centre of mass
rcm = sum of ri mi / sum of mi
for an athlete to complete the frosby flop they must create …
rotation about the “centre of mass”
what is the first thing we have to do in the frosby flop (what type of force and what does this create)
first we have to do work on our centre of mass to give it kinetic energy for the jump
we have used an off centre force which created rotation of the body with our push off
in the air what do we do in the frosby flop
in the air we can redistribute our segments to manipulate the location of the CoM, to control rotation of the body, keeping the CoM as near to the bar as possible
