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A particle travelled first 10 m with 2 m/s, next 10 m with 3 m/s and last 10 m with 6m/s then its average speed is (in m/s)  :

Option: 1

3


Option: 2

4


Option: 3

5

 


Option: 4

6


Answers (1)

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As we learned

Tips for average speed. -

If an object or body covers s1 distance in t1 time and s2 distance in t2 time then average speed is calculated by the
formula

V_{av}= \frac{s_{1}+s_{2}}{t_{1}+t_{2}}

-

 

 Total distance = ( 10 + 10 + 10 ) m = 30 m

Total time =    \frac{10}{2}+\frac{10}{3}+\frac{10}{6} = \frac{30+20+10}{6}sec=10\: sec

Average Speed =      \frac{Total \; distance}{Total\; time}=\frac{30\, m}{10\, sec}=3\, m/s

 

Posted by

rishi.raj

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