A bidy of mass m kg starts falling from a point 2r above the earths surface find its kinetic energy when it has fallen to a point r above
Answers
Answered by
7
Change in KE= Change in PE
Change in PE = GMm/r - GMm/2r = GMm/2r
As initially KE was 0... Therefore, Kinetic Energy at r height = GMm/2r
Change in PE = GMm/r - GMm/2r = GMm/2r
As initially KE was 0... Therefore, Kinetic Energy at r height = GMm/2r
Answered by
7
Answer:When body starts to fall towards earth's surface, its potential energy decreases so kinetic energy increases.
Increase in kinetic energy = decrease in potential energy
Final Kinetic - Initial Kinetic Energy = Initial Potential energy - Final Potential Energy
Final - 0 = −GMmR+2R−(−GMmR+R)
Final = −GMm3R+(GMm2R)
Final = (GMm6R)
Explanation:
Similar questions