what is measurement what is the need of correct measurement
Answers
Ans : Measurement is the comparison of an unknown quantity with a known standard quantity (constant quantity) or unit of same nature.
⭐️ NEED OF CORRECT MEASUREMENT ?
Ans : Establishment and verification of physical laws demand observations and measurements. Improper measurements are not considered accurate and hence are not accepted. The most common improper method of measurement is HANDSPAN. Besides, for the correct measurement of anything, we need proper measuring instruments and measuring units. People at last realised the need of standard units for measurement and a proper measurement system.
Measurement
Measurement can be defined as the comparison of unknown quantity with a standard quantity. For example, comparison of foot with metre scale.
Needs of Measurements
Physics is branch of science dealing with nature and natural phenomena. For a proper description of any natural phenomena, measurement of the various quantities involved in it is essential. For example, a body released freely from a height falls on earth. It is a natural phenomena which we have to describe it completely we must tell the velocity of fall, the time taken in falling and so on. It means the measurement of distance, mass and time is necessary for the description of the natural phenomena.
Following Examples
The need for measurement is clear from the following examples are:
1. we can find the speed if we can measure the distance travelled and time taken to travel that distance.
Speed = Distance / Time
2. In order to find the acceleration produced in the body we should know the magnitude of force acting on the body and mass of the body.
Acceleration = Force / Mass
3. Again we can find pressure if we measure the force acting and the area over which the force acts.
Pressure = Force / Area
#Be Brainly