This book is designed as an advanced guide for experiments of Physics: measurement and uncertainties, systematic error and accuracy, random error and precision, system of units, rules of addition and subtraction, rules for multiplication and division, estimation of uncertainties in many measurements, uncertainties in one measurement, measurement in no digital equipment, uncertainties in digital equipment, error propagation method, statistical analysis and graph, estimation of uncertainties for many measurements, least square method and linear regression analysis, least square method for a polynomial fit, Gaussian Distribution, Poisson Distribution, Error propagation and probable errors, Taylor function for the differential error analysis, inclined plane, fixed pulley and statistic friction, hoist, spring constant, decomposition of forces in two and three dimensions. It is hoped that this book covers all needs of the students and achieves the interest and motivation of the students for the real nature of the Physics.