engineering recuitment BEL Probationary Engineers Mock Test 2025 Engineering Mathematics Calculus Vector Calculus
If a constant force \(\vec{f}\) applied on an object P, displaces it by a distance \(\vec{d}\), inclined at an angle θ to the direction of force \(\vec{f}\), then the work done by the force \(\vec{f}\) is
1
\(\rm{div(\vec{f}~\times~{d})}\)
2
\(|\vec{f}~\times~\rm{curl}\;\vec{d}|\)
3
\(|\vec{f}~\times~\vec{d}|\)
4
\(\vec{f}.\vec{d}\)