(a)[3]
A cylinder is formed from a substance with density $2.7\,\text{g cm}^{-3}$. Its diameter is $2.4\,\text{cm}$ and its length is $5.0\,\text{cm}$. Show that the cylinder’s weight is $0.60\,\text{N}$.
(b(i))[1]
Explain the meaning of centre of gravity.
(b(ii))[3]
Calculate X's weight.
(c(i))[2]
The cylinder is now immersed in water. Explain how the upthrust is produced.
(c(ii))[1]
Explain why X's weight has to be reduced to achieve equilibrium for AB.