nonequilibrium applications?

Question

A weight of the block on a table is 494 N and that of a hanging block is 175 N. Ignore all frictional effects, and assuming the pulley to be massless.

a) Find the acceleration of the two blocks.
____m/s2

(b) Find the tension in the cord.
_____N

Answer 1

Let W1= 494 N amd W2=175 N
F=ma
W=mg
m1=W1/g
m2=W2/g

W2=(m1+m2)a
a=W2/(m1+m2)
a= g W2 /(W1+W2)
a= (9.81 x 175)(494 + 175)
a=2.57 m/s^2

Tension = W2-W1(a/g)
T=175 - 494 (2.57/9.81)
T=45.78 N