Fil in the blanks.
1) 640 centimeters
cm
2) 5070 metres
km
metres
Answers
Answer:
(i) One meter is 100 cm.
(ii) Five kilometers is 5000 m.
Explanation:
We know that 1 km = 1000 m
∴ 5 km = 1000 × 5 = 5000 m
(iii) Motion of a child on a swing is periodic.
Explanation: Motion which repeats itself after certain intervals is called periodic motion. Since the motion of a swing also repeats after regular intervals so, the motion of the child on a swing is periodic.
(iv) The motion of the needle of a sewing machine is periodic.
Explanation: The needle of a sewing machine while moving up and down, repeats its motion after regular intervals so it possesses periodic motion.
(v) The motion of the wheel of a bicycle is circular.
Explanation: When an object moves in such a way that its distance from a fixed point remains the same, it is said to have circular motion. Since, the wheel of a bicycle rotates about its central part which remains fixed as the bicycle moves hence, the wheel possesses circular motion.
Step-by-step explanation:
Answer:
1.640centimeters = 6.4 metres
2.5070metres = 5.07km
Step-by-step explanation:
1) 1 cm = 0.01 metre
Therefore,640 cm= 6.4 metres
2) 1 km = 1000 metre
Therefore,5070 metres = 5070/1000 = 5.07 km