Secundaria Falling, pulling mass

[Xiomy]

Two blocks are arranged as shown. The pulley can be considered to be massless, and friction is negligible. M1 is five times more massive than M2.

If the system is released from rest, how far will M1 travel in 0.875 s?

Mi idioma es el español, pero para que lo entiendan mejor no se los traduzco al español, para evitar errores.

[Xiomy]

Re: Falling, pulling mass

Aqui va el resultado!

a={M_2/(5M_2+M_2)}*9.81m/s^2
a=1.635m/s^2

x=x_o+V_ot+(1/2)at^2
x=6.25E-1 m