CBSE Class 11-science Answered
IF LINEAR MOMENTUM OF A BODY IS INCREASED BY 50% OF ITS INITIAL VALUE THEN WHAT WILL BE THE % CHANGE IN KINETIC ENERGY OF THE BODY ?
Asked by pardeepkumar2281 | 26 Sep, 2018, 08:55: PM
Expert Answer
momentum is increased by 50% means, speed is increased by 50% because mass remains constant.
Kinetic Energy E = (1/2)×m×v2 ..................(1)
if we differentiate eqn.(1), we get, dE = (1/2)×m×2v×dv ..........(2)
from (1) and (2), we get, ( dE/E ) = 2×(dv/V) or (dE/E)×100 = 2×(dv/V)×100 .................(3)
from eqn.(3), we say that percentage change in kinetic energy is twice the percentage change of speed.
hence if speed increases by 50%, energy increases by 100%
Answered by Thiyagarajan K | 27 Sep, 2018, 08:23: PM
CBSE 11-science - Physics
Asked by sheikhsaadat24 | 17 Apr, 2024, 09:41: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by sy123946 | 07 Apr, 2024, 04:23: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by derhebha955 | 03 Apr, 2024, 09:03: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by sumedhasingh238 | 29 Mar, 2024, 05:15: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by sumedhasingh238 | 28 Mar, 2024, 11:10: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by roshnibudhrani88 | 23 Mar, 2024, 05:52: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by emad.amd | 21 Mar, 2024, 12:00: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by vinitdubey7735 | 14 Mar, 2024, 11:21: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by om636694 | 04 Mar, 2024, 09:10: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by rajuinwati12 | 04 Mar, 2024, 09:22: AM
ANSWERED BY EXPERT
