Correct the following statements :
1. The Cholas ruled in the region of Bengal, Bihar and Jharkhand.
2. Dantidurga established the Pratihara dynasty.
3. Mohammad Ghori invaded India, 17 times.
4. Kanchipuram was the capital of the Cholas.
Answers
Answer❣
Question :
An object travels 20m in 4s and then other 20m in 10s . What is the average speed of the object ?
Solution :
As per the question we have two cases so let's assume each as Case 1 and Case 2 respectively !
Case 1 :
Distance Covered : 20m
Time taken : 4 sec
Speed : Distance / time
: 20 / 4
: 5 m / sec
Case 2 :
Distance Covered : 20 m
Time taken : 10 sec
Speed : Distance / time
: 20 / 10
: 2 m / sec
huge average speed = total distance total time
averagespeed=totaltimetotaldistance
= \5 + 2 4 + 10=4+105+2
= 7 40 = 0.175=407=0.175
Hence , the average speed of the object is 0.175 m / sec !!
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Answer:
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. ... Time in physics is operationally defined as "what a clock reads".