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Q1. Block B rests upon block A on an inclined plane and is tethered parallel to the incline and secured to a wall that is perpendicular to the same incline as shown in Fig Q1. Blocks A and B weigh 90 N and 30 N respectively and the coefficient of friction at all contact surfaces is one third.

Calculate EACH of the following:

(a) The minimum angle which will cause block A slide down the incline; (12)

(b) The tension in the tether holding block B at this angle of incline. (4)