Question) Solve this
When a body is projected vertically up from the ground, its potential energy and kinetic energy at a point P are in the ratio 1:5. If same body is projected with half the pervious velocity, then at the same point P, ratio of its potential energy and kinetic energy would be
A. 1 : 2
B. 2 : 1
C. 1 : 5
D. 2 : 5
Dear student
Let H be the maximum height reached by thr body and h be the height above the ground where
P.E. : K.E. = 1:5
supposed it reached the point p
at p energy is = K.E. + P.E.
K.E. at point p = mgH-mgh = mg (H-h)
when body is projected upwards
ratio = 2:1
Regards
Let H be the maximum height reached by thr body and h be the height above the ground where
P.E. : K.E. = 1:5
supposed it reached the point p
at p energy is = K.E. + P.E.
K.E. at point p = mgH-mgh = mg (H-h)
when body is projected upwards
ratio = 2:1
Regards