How high must a body be lifted to gain an amount of P.E. equal to the – InterviewSolution

1.	How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20ms^(-1). (The value of acceleration due to gravit at a place is 9.8ms^(-2))
Answer» SOLUTION :`mgh=1/2 MV^(2)` so `h=20.4m`

Discussion

No Comment Found

Related InterviewSolutions

What is the reason for the twinkling of stars ?
The change in magnetic field lines in a coil is the cause of induced electric current in it.Name the underlying phenomenon.
Say True or False.The mass of the Earth is 6.4xx10^(6)kg.
Whichof the follwing property of a proton can changewhileit moves freelyin a mageticfield ? (There may be more thanone correct answer).
When an object is placed infront of a spherical mirror at a distance 30 cm, the magnification is -1. Illustrate the conclusions.
Does the frequency of sound waes depend on the medium in which it travels?
The relation between N (no. of molecules), P,V. & T is ...........
What is magnification of a lens ?
A person is said to be colour blind if he/ she has deficiency of rod shaped cells in retina of his eyes.
"___________" prepares the 'Red List' that contains the names of endangered species from different countries.