posted by Anonymous .
Two packing crates of masses m1 = 10.0 kg and m2 = 4.40 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 4.40-kg crate lies on a smooth incline of angle 41.0°.
find the acceleration of the 4.4kg crate
find the tension in the string
it the incline up,or down?
Assuming the m2 is going uphill towards the pulley.
net pulling force= m1*g-m2*g*sinTheta
retarding force= (m1+m2)a
set them equal, solve for a.
Tension: it is pulling against m2*g*sinTheta+m2*a
so that is what tension is.
thanks that was really helpful