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I would request unacademy to kindly continue this video series for at least a month for COAL INDIA Interview.....marut sir is just superb....gave actual interview experience.....the only video of its kind on youtube
I must say that you are the only person on this earth who have the best handwriting on digital board!! I swear I never saw someone before writing so neatly on digital board!! I wish your font style was available to download!!
The moment you hear about stiffness, the first thing that comes to your mind is the simple formula F=k*x. So from this, you can define stiffness as the force required to create a unit displacement, in the direction of the force. I don't know if the answer is satisfactory or not.