Practice question

Given: A force F = -5i + 2j N acts on a particle moving along d = 3i + 4j m . What is the work done? These values define the system as per NCERT data. Formula: Work W = F · d. This is standard NCERT relation. Substitution & Calculation: F = -5i + 2j, d = 3i + 4j . Scalar product: W = (-5 × 3) + (2 × 4) = -15 + 8 = -7 J . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.