A force N causes an object to move m in the direction of the vector

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

Problem

A force

\vec{F} = 4\mathbf{i} + 3\mathbf{j} + 2\mathbf{k}

N causes an object to move

3

m in the direction of the vector

\mathbf{i} - 2\mathbf{j} + 2\mathbf{k}

. Find the work done. (a)

6\,\text{J}

(b)

-2\,\text{J}

(c)

2\,\text{J}

(d)

\frac{2}{3}\,\text{J}