Homework Help: Khan

Posted by Hajib on Tuesday, November 15, 2011 at 9:52pm.

A person lifts a 4.3 kg cement block a vertical
distance of 1.3 m and then carries the block
horizontally a distance of 5.3 m.
The acceleration of gravity is 9.81 m/s
2
.
a) Determine the work done by the person
in the process.
Answer in units of J

Physics(work done) - MathMate, Tuesday, November 15, 2011 at 10:10pm
There is no work done by moving the load horizontally.
The only work done is the lifting, which is equivalent to the potential energy gained by the block given by:
Ep=mgh.

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