Torque, Rotation, Equilibrium and CoM.

Question 1

the net turning effect on an object is equal to …

Answer 1

the sum of torques

Question 2

what is an equilibrium?

Answer 2

when the size and directions of the forces acting on an object are balanced.

Question 3

center of gravity

Answer 3

the point about which the resultant torque of all forces acting on the body are zero.

Question 4

centre of mass

Answer 4

the point around which all the particles are evenly distributed is the point at which we can draw a single weight vector (Fw).

Question 5

why is it hard to locate the CoM of an athlete in action?

Answer 5

they are always moving, therefor the CoM will always be moving.

Question 5

so how do we locate the centre of mass ?

Answer 5

take an origin point.

Question 6

science behind the fosbury flop

Answer 6

must create rotation about the ‘center of mass’. to maximise position over the bar without having to get the CoM over.

Question 7

how does the fosbury flop help us undertsand how someone can jump higher?

Answer 7

we have to work on our CoM to give it kinetic energy for the jump. we have used an off centre force which created a rotation of the body with our push off. in the air we can redistribute our segments to manipulate the location of the CoM to control the rotation of the vody keeping COM as near the bar as possible,