Question

A particle moving along x axis with speed 6 m/s for the first half distance with a speed 3 m/s. The average speed in tital journey is :

Answer 1

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Q. A particle moving along x axis with speed 6 m/s for the first half distance with a speed 3 m/s. The average speed in tital journey is :

solution :-

let the distance be 2x
1st half


distance =x

speed is 6m/s 
s=d/t 

t=d/s
=x/6 

2nd half 
distance x

speed is 3m/s 
time =d/s
=x/3 

average speed=total dist /total time 

=x+x/(x/6)+(x/3)
=2x/3x/6

=2x× 6/3x

=4m/s Ans

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