Q7. When object is said to be in rest?
Q8. What do you understand by ‘measurement’?
Answers
Explanation:
Q7 . ans : In physics, rest is the state an object being stationary relative to a particular frame of reference or another object; when the position of a body with respect to its surroundings does not change with time it is said to be "at rest".
Q8 . ans : Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events. ... Measurement is a cornerstone of trade, science, technology, and quantitative research in many disciplines.
Answer 1 :-
Rest is the state an object being stationary relative to a particular frame of reference or another object; when the position of a body with respect to its surroundings does not change with time it is said to be "at rest".
Answer 2 :-
Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events. ... This system reduces all physical measurements to a mathematical combination of seven base units. The science of measurement is pursued in the field of metrology.