# Integration and differntial calculus

Is there anyway to understand the integration and differential calculus function logically? I've been doing the sort of integration and calculus since I was 11 class...now I am in Bachelors but I cannot understand how this Integration and Calculus works in real life. Some says its very much useful in physics problem. But still how does it works in physics problems? Can anyone give me example related to that?

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An example in physics that uses integration is impulse $$J=\int_{\Delta t} F dt$$.