- #1

Mitch1

- 55

- 1

## Homework Statement

A shaft 2 m long rotates at 1500 revs min–1 between bearings as

shown in FIGURE 2. The bearings experience forces of 5 kN and

3 kN acting in the same plane as shown. A single mass is to be used

to balance the shaft, so that the reactions are zero. The mass is to be

placed at a radius of 200 mm from the shaft centre, 180° from the

direction of the bearing reactions. Determine the size and position (a

and b) of the mass to be used.

(b) The shaft in part (a) is to be balanced using two masses (m1 and m2)

placed 0.5 m and 1.5 m from end A and 180° from the direction of

the bearing reactions, each on radius arms 100 mm long. Calculate

the sizes of m1 and m2.

## Homework Equations

F=mrω^2

up forces must equal down to be in equilibrium

## The Attempt at a Solution

It is B) that I am confused about

Do you need to use some sort of simultaneous equation to work out any of the two masses ? I have tried using the balancing equating but I can't seem to get the correct answer