Homework Help: Physics

Posted by Mary on Tuesday, April 24, 2007 at 2:51pm.

A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open at the top. Friction is absent. The spring constant of the spring is 4100 N/m. The piston has a negligible mass and a radius of 0.023 m.

(a) When air beneath the piston is completely pumped out, how much does the atmospheric pressure cause the spring to compress?

(b) How much work does the atmospheric pressure do in compressing the spring?

Physics - Ben, Monday, October 24, 2011 at 6:28pm
A) Pressure=Force/Area
101,300=F/pi(.023)^2
Solve for f, then plug F into
F=kx.
k=4100
solve for X

B)work=change in enegy,
measure SPE (spring potential energy)
SPE=.5Kx^2

X is the answer from part A

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