Question

an object travelled half of the distance with a velocity V, the remaining part of distance was covered with velocity v1 for half of the time with velocity for other half time.find average velocity for the whole time of motion.
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Answer 1

Answer:

2VV1/V1+V

Explanation:LET THE DISTANCE BE D.

NOW FOR FIRST HALF ,

TIME =DISTANCE /SPEED=D/2/V=D/2V

FOR SECOND HALF ,

TIME =DISTANCE /SPEED=D/2/V1=D/2V1

NOW AVERAGE SPEED=TOTAL DISTANCE /TOTAL TIME

D/D/2V+D/2V1=2VV1/V1+V(BY SOLVING)