Two packing crates of masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.00 kg crate lies on a smooth incline of angle 40.0°. Find the acceleration of the 5.00 kg crate.

Question

Find the tension on the string.

Answer 1

m1•a=m1•g –T
m2•a=T-m2•g•sinα
a(m1+m2)= m1•g –T+ T-m2•g•sinα,
a=g•(m1+m2•sin α)/(m1+m2) = ...
T= m1•(g-a)=...

Answer 2

124N