A force moves a particle through a displacement

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A force

\vec F = 3\,\hat i + 4\,\hat j\;\text{N}

moves a particle through a displacement

\vec s = 2\,\hat i - 1\,\hat j\;\text{m}

. What is the work done by the force? (a)

10\,\text{J}

(b)

2\,\text{J}

(c)

11\,\text{J}

(d)

6\,\text{J}