Question

Need help with this question.
m1=9kg
m2=5kg
m3=2kg
m4=1kg
µ=0.15

find
a=?
y=?

thx

Answer 1

angle alpha=20 degrees
angle beta = 32 degrees

Answer 2

do a mean acceleration ? what does y mean

Answer 3

try and rephrase the question better if you're calculation acceleration how are the blocks moving what angles go with what.