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he following questions in
1.
How does measurement help us in our day-to-day life?
2.
Which type of watch is used to measure time intervals in a 200 metre mesa
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3.
When do we consider an object to be in motion?
4.
Name three different types of motions and give one example of each.
5.
State the difference between a 'periodic and a 'non-periodic' motion,
Answers
Answer: 1.
Measurements continue to play an important role throughout everybody's life, for example, during a medical check-up, a sports competition, when building a house, when controlling temperature in appliances, or while cooking.
2. The stopwatch is a watch which can be started or stopped when desired. It is used to measure small intervals of time.
3.An object is in motion if it changes position relative to a reference point. Objects that are fixed relative to Earth – such as a building, a tree, or a sign - make good reference points.
4. Translational motion - Motion in which a body shifts from one point in space to another. E.g., the motion of a car on a straight road.
Oscillatory motion - To and fro motion about a mean position. ...
Circular motion - Motion of an object along the circumference of a circle.
5. 1. A motion that repeats itself at regular intervals is termed periodic motion. 1. A motion that does not repeat itself at regular intervals is termed non-periodic motion.
Explanation: