# Motion and Measurement of Distances

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## Presentation Description

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By: praveenbabu.kodru (41 month(s) ago)

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By: singhaadhitya (52 month(s) ago)

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## Presentation Transcript

### PowerPoint Presentation:

Motion and Measurement of Distances. By K. Praveen Babu

### What are the means of transportation ?:

What are the means of transportation ? TRAIN BUS SHIP AEROPLANE BICYCLE BIKE

### How do people know how far they have travelled ?:

How do people know how far they have travelled ? This is done by a term called Measurement Measurement means the comparison of an unknown quantity with some known quantity. The known fixed quantity is called a unit . The result of a measurement is expressed in two parts . One part is a number . The other part is the unit of the measurement .

### Example:

Example The length of a hand measures 9 cms. 9 cm Cm is the unit. (fixed quantity) The number 9 forms one part. (unknown quantity)

### Different units of Measurement:

Different units of Measurement For sake of uniformity, scientists around the world have accepted set of standard units of measurement known as the International system of units (SI Units).

### Different units of Measurement:

Different units of Measurement The SI unit of length is a Meter. Each centimeter has 10 parts called millimeter (mm). Each meter (m) is divided into 100 parts called centimeters . (cm) For measuring large distances we use a larger unit of length called kilometers .

### PowerPoint Presentation:

1m = 100cm 1cm = 10mm 1km = 1000m

### Instruments used for measuring length:

Instruments used for measuring length Have you ever observed A tailor uses Whereas the measuring carpenter uses a Tape to measure different cloths. measuring tape.

### You may observed the motion of a vehicle on the road or a bird flying:

You may observed the motion of a vehicle on the road or a bird flying Motion is defined as some kind of change in the position of an object. There are three types of motion. Rectilinear motion Circular motion Periodic motion

### Rectilinear Motion:

Rectilinear Motion Motion in a straight line is called Rectilinear Motion . Car on a straight road. March-past of soldiers. Water falling from a height.

### Circular Motion:

Circular Motion In an circular motion an object moves such as that distance from the fixed point remains the same. Blades of a fan Giant wheel Movement of moving. moving. Planets.

### Periodic Motion:

Periodic Motion Motion that repeats itself after a period of time, is called as Periodic Motion . Motion of a Motion of a child Branch of a Pendulum. On a swing. Tree moving to and fro.

### Can an object undergo more then one motion at the same time ?:

Can an object undergo more then one motion at the same time ? A ball rolling on ground shows both rotational and rectilinear motion. A sewing machine remains at the same location while its wheel moves with an circular motion. It also has a needle moving up and down undergoing periodic motion.

### PowerPoint Presentation:

The change in the position of an object can be determined through distance. Measurements which we have discussed earlier. This allows us to know how fast or slow motion is.

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