An uniform wooden beam AB, 80 cm long and weighing 250 gf, is supported on a wedge as shown in Fig. below calculate the greatest weight which can be placed on end A without causing the beam to tilt.

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Solution

Step: 1 Given
Length of Wooden Beam = 80 cm
Weight of Beam acting at centre( 40 cm) = 250 gf
Step - 2
Diagram -
Let the weight M gf is placed at a distance of 10 cm from the fulcrum.
Step - 3
Formula used :
Anticlockwise Moment = Clockwise Moment
M x 10 = 250 x 30
M = 750 gf
Hence, the greatest weight that can be placed on A will be 750 gf.

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