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A particle moves 50 m in 5 second, then 20 m in next 4 second and 30 m in next 7 second then average speed (in m/s) of the particle is :

Option: 1

6.25


Option: 2

7.25


Option: 3

8.50

 


Option: 4

5


Answers (1)

best_answer

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 travelled = (50 + 20 + 30 ) m = 100 m

Total time taken = 16 Second.

\therefore   Average speed = \frac{100}{16}\: m/sec=6.25\, m/sec

 

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