Question

Ten bricks, each 6.0 cm thick and mass 1.5 kg, lie flat on a table. How much work is required to
stack them one on the top of another?​

Answer 1

Step-by-step explanation:

The centre of gravity of the bricks is initially 3 cm above the table.

The centre of gravity after stacking is 30 cm above the table.

The CG rises 27cm (0.27m), the mass is 15kg and if g is 10 N/kg the gain in energy is

0.27 x 15 x 10 Newton-metres or Joules

40.5 J

Answer 2

Answer:

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