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Sample Problem 7 Over a horizontal plank a small block of mass m is lying at rest. Now plank is moved with constant acceleration

Sample Problem 7 Over a horizontal plank a small block of mass m is lying at rest. Now plank is moved with constant acceleration as such that there is no relative motion between block and plank. Find the work done by friction of plank on block in first t seconds. a (i) in ground frame (ii) in plank frame (b) zero, mat2 2. (a) -ma't,zero 1. (d) ma'tmat? (C) zero, zero

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