A mechanic pulls a spanner of length with a constant force

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

Problem

A mechanic pulls a spanner of length

0.25\,\text{m}

with a constant

35\,\text{N}

force. About the nut at the other end of the spanner, the torque depends on the angle

\theta

between the force and the spanner. For which value of

\theta

will the torque be zero? (a)

60^{\circ}

(b)

0^{\circ}

(c)

90^{\circ}

(d)

30^{\circ}