Subject :NSO Class : Class 9
The kinetic energy acquired by a body of mass m after travelling a fixed distance from rest under the action of a constant force is
(A) Directly proportional to mass m
(B) Inversely proportional to mass m
(C) Inversely proportional to mass m1/2
(D) Independent of mass
m.
ANswer Given By SOF is D.But isnt K.E.=1/2mv^2
Ans 1:
Class : Class 9
Option D because Kinetic energy means work done. Therefore, it can be said that work is done on body or can be said mass. W = F*D(Force * Displacement). Therefore it is independent of mass.