A uniform light beam of length is hinged at end and kept in a horizontal position

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A uniform light beam

AB

of length

1.2\,\text{m}

is hinged at end

A

and kept in a horizontal position. A force of

40\,\text{N}

is applied at the free end

B

, making an angle of

37^{\circ}

with the beam (below the beam). (a) Determine the perpendicular distance of the line of action of the force from the hinge at

A

. (b) Hence calculate the magnitude of the moment produced about the hinge.