Homework Help: physics

Posted by Anonymous on Wednesday, September 28, 2011 at 5:19pm.

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

physics - bobpursley, Wednesday, September 28, 2011 at 5:25pm
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.
physics - Anonymous, Wednesday, September 28, 2011 at 5:31pm
thanks that was really helpful

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