CBSE Class 11-science Answered
on a 60km track,a train travels the first 30 km with a uniform speed of 30km/h. How fast must the train travel the next 30km so as to average 40km/h for the entire trip? please explain briefly.
Asked by | 08 Aug, 2012, 06:54: PM
Expert Answer
Time taken for first interval: t1 = 30/30 = 1 hr
average speed to maintain: v = 40 km/hr
total distance, s = 60 km.
Since average speed = (total distance travelled)/(total time taken)
thus total time taken: T = 60/40 = 3/2= 1.5 hr
thus time taken for second interval = 0.5 hr
thus speed in second interval: 30/0.5 = 60 km/hr
Answered by | 09 Aug, 2012, 10:27: PM
Concept Videos
-
Displacement and Average Velocity
This video explains the calculation of displacement and average velocity of... -
Graphical Representation - 1
-
Acceleration - Part 1
This video explains the graphical representation of distance with a body an... -
Kinematics of Linear Motion - 1
This video explains the determination of the kinematic equation of linear m... -
Average Speed and Average Acceleration
This video explains the calculation of average speed, average acceleration ...
CBSE 11-science - Physics
Asked by prashantgaikwadfox000 | 25 Sep, 2022, 05:38: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by ukalyadab | 18 Jul, 2022, 11:52: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by madhavrao135 | 13 Jul, 2022, 07:33: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by piyushhoney2006 | 20 Jun, 2022, 04:12: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by varmaakshay2020 | 13 Jun, 2022, 11:43: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by sush75 | 15 Mar, 2022, 04:02: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by solankihemant2007 | 05 Mar, 2022, 05:19: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by chinttubabu9692 | 27 Jan, 2022, 06:37: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by anyone.viv7807191905 | 21 Dec, 2021, 11:40: PM
ANSWERED BY EXPERT