# Applying Newton's Three Laws

### Problems

Problem :

A 5kg picture frame is held up by two ropes, each inclined 45 o below vertical, as shown below. What is the tension in each of the ropes?

Problem :

Consider a 10kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10kg block hanging free, as seen in the figure below. What is the direction and magnitude of the resulting acceleration of the 2-block system?

Problem :

Two 10kg blocks are connected by a rope and pulley system, as in the last problem. However, there is now friction between the block and the incline, given by μ s = .5 and μ k = .25 . Describe the resulting acceleration.

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