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# MEI Mechanics 2 Moments watch

1. A non-uniform beam PQ of length 4m and weight 400N is held horizontally by smooth supports at R and S where PR = SQ = 1m. A boy of weight 500N can just stand at end P without the beam overturning.

(i) Find the position of the centre of mass of the beam
(ii) The boy walks towards Q. Find the distance from Q when the beam is about to tip.

Edit : I got it now, didn't need help after all It can be deleted.
3. (Original post by Quido)
A non-uniform beam PQ of length 4m and weight 400N is held horizontally by smooth supports at R and S where PR = SQ = 1m. A boy of weight 500N can just stand at end P without the beam overturning.

(i) Find the position of the centre of mass of the beam
(ii) The boy walks towards Q. Find the distance from Q when the beam is about to tip.

Edit : I got it now, didn't need help after all It can be deleted.

Does anyone know how to solve this?
4. (Original post by Lauryngarmun)
Does anyone know how to solve this?

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Updated: February 14, 2018
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