A ball of mass 0.5kg is dropped from a height of 8m. What is its kinetic energy just before hitting the ground? (Take g\
Kinetic energy K=½mv² and potential U=mgh per NCERT. Energy conservation K+U=constant for conservative forces. Substituting m, v, h gives 40 J as energy, matching option C.
Ref: NCERT Class 11 Physics > Chapter 6: Work, Energy and Power > Topic: Collisions and Power
