Q: An 8 kg metal block of dimension 16 cm × 8 cm × 6 cm is lying on a table with its face of largest area touching the table. If g = 10 ms–2, the minimum amount of work done in making it stand with its length vertical is
(a) 0.4 J
(b) 6.4 J
(c) 64 J
(d) 4 J
Ans: (d)