Posted by
**McCaleb** on
.

A pulley system has an efficiency of 78.0 per-

cent.

The acceleration of gravity is 9.81 m/s2 .

How much of the rope must be pulled in if

a force of 469 N is needed to lift a 52 kg desk

2.78 m?

Tuesday

March 28, 2017
Posted by
**McCaleb** on
.

A pulley system has an efficiency of 78.0 per-

cent.

The acceleration of gravity is 9.81 m/s2 .

How much of the rope must be pulled in if

a force of 469 N is needed to lift a 52 kg desk

2.78 m?

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