
Solution :
a). From Newtons second law,
F = ma
The total tension force is 2T.
∴ 2T - (m + M)g = (m+ M)a
Then
[tex]$a=\frac{2T-(m+M)g}{m+M}$[/tex]
[tex]$a=\frac{2\times 600-(52+63)9.8}{52+63}$[/tex]
  [tex]$=0.63 \ m/s^2$[/tex]
b). From the person,
  F = ma
 T - Mg + N = Ma
or N = Ma + Mg - T
    = (63 x 9.8) + (52 x 9.8) - 600
    = 617.4 + 509.6 - 600
    = 527 N