BPSC – Combined Competitive Examination · প্রশ্ন 125
The potential energy of a freely falling body continuously decreases. Therefore:
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (B) The principle of conservation of energy is not violated
ব্যাখ্যা
As the body falls, potential energy converts to kinetic energy; total mechanical energy is conserved.
- (A) ভুল
Wrong: lost potential energy becomes kinetic energy, so energy is conserved.
- (B) সঠিক
Correct: PE + KE stays constant (ignoring air resistance).
- (C) ভুল
Wrong: meaningless; gravity is what causes the fall.
- (D) ভুল
Wrong: irrelevant to the energy question asked.