Question

Answer the following questions.
1. Traditional methods of measurement are not reliable compared to standard methods of measurement. Explain.
2. Give five examples of different types of measurements we need in our day-to-day life
3. What are the different types of motion? Give two examples of each.
4. Can a body have rotational motion and rectilinear motion at the same time? Justify.
5. Explain the types of translatory motion with one example for each.​

Answer 1

Answer:

1 ) Traditional methods of measurement involve methods like measurement using the arm, foot or hand span of a particular person which can and does varies form person to person and hence can't be reliable while the standard methods have a fixed standard value which is universal and same for everybody and every place .

2 )Time, size, distance, speed, direction, weight, volume, temperature, pressure, force, sound, light, energy௮these are among the physical properties for which humans have developed accurate measures, without which we could not live our normal daily lives. Measurement permeates every aspect of human life.

3 )In the world of mechanics, there are four basic typeEx: a) Motion of satellites around planets. b) Motion of car turning to a curved track .

4 )The wheel of a bicycle is rotating on its axle and also moving forward in a straight line. So, a bicycle moving on a straight road has two types of motion rotational motion as well as rectilinear motion. (4) Example of sewing machine ௭ The swing machine has a wheel which rotates on an axle.

5 )TYPES OF TRANSLATORY MOTION RECTILINEAR MOTION-If a body moves in a straight line it is called a Rectilinear motion. CURVILINEAR MOTION-If a body moves along a curved path then it is said to have curvilinear motion.

Answer 2

1) Traditional methods of measurement use techniques like measuring a person's arm, foot, or hand span, which can and do vary from person to person and are therefore unreliable, as opposed to standard methods, which use a defined standard value that is the same everywhere and for everyone.

2) The physical characteristics for which humans have developed precise measurements include time, size, distance, speed, direction, weight, volume, temperature, pressure, force, sound, light, and energy. Without these physical characteristics, we would not be able to go about our daily lives as usual. Each and every area of human life involves measurement.

3)There are four main types of motion in the field of mechanics. They are,

1. Linear
2. Oscillation
3. Rotational
4. Circular

 a) the motion of satellites around planets; b) the motion of a car turning on a curved track.

4) A bicycle's wheel rotates on its axle while also travelling straight ahead. As a result, a bicycle riding along a straight road experiences both rotational motion and rectilinear motion. In Sewing machine illustration, there is a wheel on an axle attached to the swing machine. 

(5) Types of translational movement

A body moving in a straight line is referred to as a "rectilinear motion." 

CURVILINEAR MOTION: A body is said to be in curvilinear motion if it moves along a curved route.

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