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Q6. An engine crank mechanism is shown in Fig Q6. Arm OA is 120 mm long and rotates clockwise about center O. The connecting rod AB is 350 mm long and B is constrained to move horizontally.

a. Calculate EACH of the following when angle AOB = 40°:

i. The angle between the connecting rod and the horizontal; (4)

ii. The distance OB. (4)

b. Calculate the distance B moves when angle AOB changes from 40° to 1500. (8)