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Q6. A crank mechanism of an engine is shown in Fig Q6.

Arm OA is 100 mm long and

rotates clockwise about centre O. The connecting rod AB is 300 mm long and is

constrained to move horizontally.

Determine EACH of the following:

(a) the angle between the connecting rod AB and the horizontal; (5)

(b) the length of OB; (4)

(c) the distance B moves when angle AOB changes from 50° to 120°. (7)