BPSC – Combined Competitive Examination · প্রশ্ন 126
A pair of oxen exerts a force of 140 N on a plough. The field ploughed is 15 m long. How much work is done in ploughing the length of the field?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (C) 2100 J
ব্যাখ্যা
Work = force × displacement = 140 N × 15 m = 2100 J.
- (A) ভুল
Wrong: W = 140 × 15 = 2100 J.
- (B) ভুল
Wrong: W = 140 × 15 = 2100 J.
- (C) সঠিক
Correct: W = F × s = 140 × 15 = 2100 J.
- (D) ভুল
Wrong: W = 140 × 15 = 2100 J.