Work Done Calculation: Cylinder Piston System

In summary, work done in a cylinder piston system is calculated by multiplying the force exerted on the piston by the distance the piston travels, using the equation W = F x d. The unit of measurement for work done is joules (J) in the International System of Units (SI). The size of the piston does not affect the work done, but a larger piston may require more force to move it the same distance. The work done can be negative if the force and distance act in opposite directions. Friction and air resistance can decrease the efficiency of the system and result in a decrease in work done, but this can be minimized through proper lubrication and design.
  • #1
gracy
2,486
83
In numerical of calculation of work done by/on the system (cylinder piston )
the formula used Work=± p(external pressure)multiplied by change in volume
I want to ask should temperature be constant to apply this formula?I mean is this formula applicable only in isothermal condition?
 
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  • #2
You can use this formula for work anytime( as far as i know). Other equations can be derived from this depending on whether its isothermal/adiabatic. You got to play around with the basic equation to match the data you have.
Be careful when you come across processes with varying pressure.
 
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FAQ: Work Done Calculation: Cylinder Piston System

How is work done calculated in a cylinder piston system?

In a cylinder piston system, work done is calculated by multiplying the force exerted on the piston by the distance the piston travels. This can be represented by the equation W = F x d, where W is work done, F is force, and d is distance.

What is the unit of measurement for work done in a cylinder piston system?

The unit of measurement for work done is joules (J) in the International System of Units (SI). This can also be expressed in other units such as foot-pounds (ft-lb) or newton-meters (N-m).

How does the size of the piston affect the work done in a cylinder piston system?

The size of the piston does not affect the work done in a cylinder piston system, as long as the force and distance remain constant. However, a larger piston may require more force to move it the same distance as a smaller piston, resulting in more work done.

Can the work done in a cylinder piston system be negative?

Yes, the work done in a cylinder piston system can be negative if the force and distance act in opposite directions. This could occur if the piston is pushed back down by an external force after it has already been pushed up.

How do friction and air resistance affect the work done in a cylinder piston system?

Friction and air resistance can decrease the efficiency of a cylinder piston system, as they can oppose the motion of the piston and require additional force to be applied. This means that more work is required to achieve the same distance, resulting in a decrease in work done. However, the effects of friction and air resistance can be minimized through proper lubrication and design of the system.

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