a i). What is meant by the centre of gravity of a body? ii) What...

a i). What is meant by the centre of gravity of a body? ii) What are its positions in a uniform bar, a circle, a
triangular lamina and a uniform rectangular sheet?
b. A man carries a load of mass 2.6kg from one end of a uniform pole 100cm long which has a mass 0.4kg.
The pole rest on his shoulder at a point 60.0cm from the load and he holds it by the other end. What vertical
force must be applied by his hand and what is the force on his shoulder?

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