Transportation is the method through which one object can move from one place to another through the transport. There are different modes of transport system on the basis of their requirement.
A motion which occurs in a definite interval of times is called periodic motion. For example: needle of a sewing machine, a child on swing, needle of a clock etc.
(i) 100 According to metric scale, 1 meter = 100 cm.
(ii) 5000 1 km = 1000 meter
5 km = 5 x 1000
= 5000 meter
(iii) Circular Motion that occurs in circle is known as circular motion.
(iv) Periodic motion Motion that occurs after the same interval of time is known as periodic motion.
(v) Circular motion Motion that occurs in a circular path or when a body moves round and round called as it have circular motion.
A pace or a footstep not be used as a standard unit of length because its size of the foot can be increase with the time. Footsteps size is differ from person to person. So, it cannot be used as a standard unit of length.
1 mili-meter = 0.001 meter
1 kilometer = 1000 meter
1 centimeter = 0.01 meter
So, 1 mm < 1 cm. < 1 m. < 1 km
Height of the person is 1.65 meter.
1.65 m. = 165 cm.
1.65 m = 165 x 1000 = 1650 mm 100
Distance between Radha’s home and her school is 3250 meter.
3250 m = 3250 x 1 . 1000
3250 m = 3.25 km.
Reading of the scale at one end = 3.0 cm
Reading of the scale at other end = 33.1 cm
Total length of the needle = 33.1 – 3.0
= 30.1 cm.
Similarities between motion of bicycle and a ceiling fan:
Bicycle and ceiling fan both show circular motion. They both are fixed as wheel of bicycle is fixed as the ceiling fan.
Differences:
We could not use elastic tape to measure distance because due to elasticity its measurement is not accurate or we can say not approximate. An elastic tape is stretched when we hold it from one end. Sometimes its size is reversed. So, accurate measurement is not taken by an elastic tape.