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10. In the physical suences what is meant by classical measurement Measurement is the determination or estimation 36 of ratios b state the ate the three three steps involved in classical measurement steps 3. c. Define a rector physical quantity: of a sclar physical greantity d. two examples Give quauting; of physical exampees a vector owe tur Trofan pin 80/ The poschon Vs Time graph of a bus Journey is as shown in the figure afind the awerage Velocity btwear 266 ponit f and post 4. 400 bi Favier the instante, vlocity ap. A: - Figil 96).

Answer 1

(a) In the physical sciences, classical "measurement is the determination or estimation of ratios of quantities. Quantities are the attributes which are possible to measure atleast theoretically. (6) The three steps involved in classical measurement : 1) The choice of a standard with which the quantity to be measured can be compared. Establishment of a procedure for comparing the quantity to be measured with the standard, so that a number and a unit is determined as the measure of that quantity. 3) Recording the measure of that quantity and checking for errors (c) Vector is a physical quantity that has both S a magnitude and a direction. (d) Examples of a scalar physical quantity: 1) Mass. 2) Speed. (e) Examples of a vector physical quantity: 1) Velocity 2) Force.

| I. (a) The average velocity between point I and point 4: v= xu-x, (Here, ku = 40km ty-t, x, = 60km = = (40-600 km/h tuz 5 hrs (5) ti z Ohrs ) z) = -4 km/h So, the required average velocity is -4 km/h. (by Instandemons velocity at point A. Vins = XA (Here, XA = 80km . tA : 6.5 hes) => Vins go on kuin => Vins e 12.3 kmAh So, the instantenous velocity is 12. 3 km/h.