Motion and Measurement of Distances Class 6 | Worksheet

Motion and Measurement of Distances Class 6 | Worksheet
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Motion and Measurement of Distances class 6 worksheet

Motion and Measurement of Distances class 6 worksheet based on the latest CBSE Syllabus including fill in blanks, long questions and answer, one-word answer, and more.

Motion and measurement of distance class 6 ( short notes)

In ancient times, the length of a foot, the width of a finger, and the distance of a step were commonly used as different units of measurements. A cubit as the length from the elbow to the fingertips was used in ancient Egypt and was also accepted as a unit of length in other parts of the world. People also used the "foot" as a unit of length in different parts of the world. The length of the foot used varied slightly from region to region. People measured a “yard” of cloth by the distance between the end of the outstretched arm and their chin. The Romans measured with their pace or steps. Many such body parts continue to be in use as a unit of length, when convenient. 

However, everyone's body parts could be of slightly different sizes. This must-have caused confusion in measurement. In 1790, the French created a standard unit of measurement called the metric system. scientists all over the world have accepted a set of standard units of measurement. The system of units now used is known as the International System of Units (SI units). The SI unit of length is a metre. Each metre (m) is divided into 100 equal divisions, called centimetre (cm). Each centimetre has ten equal divisions, called millimetre (mm). Thus,

1 m = 100 cm

1 cm = 10 mm

For measuring large distances, metre is not a convenient unit. We define a larger unit of length. It is called kilometre (km). 1 km = 1000 m.

In our daily life, we use various types of measuring devices. We use a metre scale. We cannot measure the length of a curved line directly by using a metre scale. We can use a thread to measure the length of a curved line

Motion

objects move along a straight line. This type of motion is called rectilinear motion.

We see that the stone moves along a circular path. In this motion, the distance of the stone from your hand remains the same. This type of motion is called circular motion.

The motion of a point marked on the blade of an electric fan or the hands of a clock are examples of circular motion. The electric fan or the clock by themselves are not moving from one place to another. But, the blades of the fan rotate and so do the hands of a clock. If we mark a point anywhere on the blades of a fan or on the hands of a clock, the distance of this point from the centre of the fan or the clock, will remain the same as they rotate.

In some cases, an object repeats its motion after some time. This type of motion is called periodic motion.

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