## Surface area of solid of revolution

If we revolve a curve y=f(x)  on the interval [a,b] about x axis, then we calculate area of resulting surface by breaking the curve into pieces as we did for arc length. A piece of curve of length dS at an average  distance y from x axis traces out a surface that is well approximated by a slice of a cone whose area is approximated by 2πydS.

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## How to find Arc Length of different curves ?

Length of a curve is called arc length.The method of finding arc length for different type of curves is very much similar, yet different formulas are used for them. Here we are going to study these formulas one by one.

To find arc length of a curve defined  by function f(x) over a certain interval [a,b] we use the following formula…

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## Fluid Pressure and Force as applications of integral.

Hydrostatic pressure and force is an important application of integrals, also used in Physics. In this topic we deal with pressure and force exerted by fluids on submerged plates.

When rectangular plate is submerged horizontally then force acting on it, is constant but when it is submerged vertically in water then pressure acting on it, is not constant throughout, so force acting on it must be calculated using slicing which leads to integral. Here you can find some examples on this topic. https://celestialtutors.com/subtopic/fluid-pressure-and-force/

## What is First order Linear Differential equation and how to solve them ?

What is Separable differential equation and how to solve them?

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## Mass, Work and Energy problems as applications of Integral Calculus

Integration is used to calculate mass of a given object based on a density function. We can calculate mass of a one dimensional  and two dimensional object using density function.

Work is said to be done if a force F , working on an object displaces the body through some distance dx. Let F(x)  represents  the force at point x, then the work done over the  interval [a,b] is given as,

#### Pumping liquids from Tanks :

The method of slicing the object into small pieces and moving each piece all the way to the top applies very nicely to situations where water or any liquid is being pumped from a tank. The work integral  so obtained will depend on the shape and geometry of  slices that occur in each problem.

For more help on this topic you can visit.. https://celestialtutors.com/subtopic/physical-applications-of-integration/