- #1

templarbaza

- 6

- 0

## Homework Statement

A non-uniform plank of wood AB has length 6m and mass 90kg. The plank is smoothly supported at its two ends A and B, with A and B at the same horizontal level. A woman of mass 60kg stands on the plank at the point C, where AC=2m. The plank is in equilibrium and the magnitudes of the reactions at A and B are equal. the plank is modelled as a non-uniform rod and the woman as a particle.

Find

(a) the magnitude of the reaction on the blank at B,

(b) the distance of the centre of mass of the plank from A.

## Homework Equations

Moment = Fx

## The Attempt at a Solution

For part A i was thinking total down = total up, if thats the case you have 90g+60g = 150g if thats the case would b = 75g as its equilibrium?

also I would take moments about point A for question (b) however I do no know what i would do from there.

Help would be appreciated