physics HElp

[M@35TR0]

http://www.xtremepapers.net/CIE/Cambrid ... 9_qp_2.pdf

In the above paper in Q 7a, how is the answer determined??????

 

[Angraiz]

The centre of mass will be 1.5m(half of length) from the front of concrete slab. So distance from wall to centre of mass = distance of front from wall - distance of front from centre of mass = 2.5 - 1.5 - 1m

 

[M@35TR0]

THanks. I understand.