Which of the following expressions gives the total work done on a body when several…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

Which of the following expressions gives the total work done on a body when several constant forces

\vec F_1,\,\vec F_2,\,\ldots

act on it while it undergoes a displacement

\vec s

? (a)

W=\vec F_{\text{net}}\times\vec s

(b)

W=\displaystyle\sum_i F_i\,s

(c)

W=\displaystyle\frac{1}{n}\sum_i \vec F_i\cdot\vec s

(d)

W=\displaystyle\sum_i \vec F_i\cdot\vec s