When two constant forces and act simultaneously on a body causing a displacement

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

Problem

When two constant forces

\mathbf{F}_1

and

\mathbf{F}_2

act simultaneously on a body causing a displacement

\mathbf{s}

, the net work done is (a)

(\lvert\mathbf{F}_1\rvert+\lvert\mathbf{F}_2\rvert)\,\lvert\mathbf{s}\rvert

(b)

\dfrac{(\mathbf{F}_1+\mathbf{F}_2)}{2}\cdot\mathbf{s}

(c)

\lvert\mathbf{F}_1+\mathbf{F}_2\rvert\,\lvert\mathbf{s}\rvert

(d)

(\mathbf{F}_1+\mathbf{F}_2)\cdot\mathbf{s}