car travels on straight road, it covers half distance with a speed of 80km/h and remaining half with a speed of 120km/h. Find average velocity?
Answers
Answered by
1
Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d
1
=80t km
During second half time, speed of car is 40 km/h
Distance covered d
2
=40t km
Total distance covered d=d
1
+d
2
=80t+40t=120t
Total time taken T=2t
Average speed v
avg
=
T
d
=
2t
120t
=60 km/hr
Option C is correct.
Answered by
1
Initial Velocity (u) = 80 km/h
Final velocity (v) = 120 km/h
Average Velocity = (v+u)/2
= (120+80)/2
= 200/2
Average Velocity = 100 km/h
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