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weedannycool

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## Homework Statement

A car mechanic wants to lift the engine from a car using a rope and pulley

arrangement. He considers two options, shown in Figure Q1a and Figure Q1b. The car engine

has a mass, m, of 200kg, and the maximum force that the mechanic can exert on the rope, P, is

1500N. Use a free-body diagram approach to derive expressions for the acceleration

experienced by the car engine in each case. Use these expressions to calculate the vertical

acceleration of the engine if the mechanic exerts the maximum force on the rope. You may

neglect the mass of the pulley systems, and assume that they are frictionless.

Why can the man lift the engine in case b)(right of the figure). but not a)(left of figure)?

## Homework Equations

[tex]\sum= Fy[/tex]

[tex]\sum=Fx[/tex]

## The Attempt at a Solution

this is a dynamics question. i think wat i would do is find the sum of forces in the X and Y direction. however i am not sure. either the or it would be using circular accelertion.

Thanks

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