Per NCERT, 1 joule equals which combination of SI base units?
A1 kg s
B1 kg m² s⁻² (since 1 N = 1 kg m s⁻², and J = N × m)
C1 kg m s⁻¹
D1 kg m²
Answer & Solution
Correct answer: B. 1 kg m² s⁻² (since 1 N = 1 kg m s⁻², and J = N × m)
Per NCERT, 1 J = 1 N × 1 m = (1 kg m s⁻²) × m = 1 kg m² s⁻². The other options miss factors.
Related questions
Per NCERT, while exercising, a girl lifts a dumbbell UP and then slowly lowers it DOWN. WhPer NCERT, what does the AREA under a FORCE vs DISPLACEMENT graph represent?Per NCERT, when you push against a rigid wall with all your strength, how much work do youPer NCERT Example 7.2, a goalkeeper's hand moves back by 15 cm while applying a force of 2Per NCERT, what does NEGATIVE work done mean?Per NCERT, what does POSITIVE work done mean?Per NCERT, if a girl carries a box HORIZONTALLY while applying an UPWARD force equal to itPer NCERT, when is the work done on an object equal to ZERO — even if a force is applied?