Question

Potential energy of a body is the energy possessed by the body by virtue of its position. P.E.`=mgh` where the symbols have their usual meaning. Kinetic energy of a body is the energy possessed by the body by virtual of its velocity.
`K.E.=(1)/(2)m upsilon^(2)`
Energy can neither be created nor be destroyed. However energy can be changed from one form to other, such that energy appearing in one form is equal to the energy disappearing in the other form.
With the help of the passage given above, choose the most appropriate alternative for each of the following question `:`
The ratio of potential energy to kinetic energy at a height of `62.5 m` above the ground is
A. 2
B. 1
C. 3
D. 4

Answer 1

Correct Answer - B
When `h` is half the original height, `P.E.= mgh` also becomes half. The other half of total energy appears as kinetic energy. Therefore, `PE//KE=1`