What is meant by the centre of gravity of a body?(Answered) State two factors that should be controlled in manufacturing a cylindrical
container of uniform thickness, which should normally be in a standing position.(Answered) State how the position of the centre of gravity of a body in stable equilibrium
changes to that in the rest position when the body is slightly tilted and then
released.(Answered) Figure 2 shows a beaker placed on a bench. A block of ice is placed in the beaker
as shown.
State and explain the change in the stability of the beaker when the ice melts.(Answered) Figure 3 shows two identical hollow spheres. Sphere A is completely filled with the
liquid while B is partially filled with identical liquid. When the two spheres are
rolled gently on a horizontal surface, it is observed that the sphere B stops earlier
than the sphere A. Explain this observation.(Answered) If the portion of the rock represented by the shaded part is chopped off, explain
why the rock may topple to the right.(Answered) Figure 3 shows two identical trolleys with loads A and B.the loads are identical in
shape and size. Given that the density of A is greater than that of B,
explain why the trolley in figure 3(ii) is more stable.(Answered) Figure 3 shows a rectangular block of wood with a hollow section (inside) at the
position shown. The block is resting on a horizontal bench
(i) State the effect on the stability of the block when the hollow section is filled with water.
(ii) Explain your answer in (i) above.(Answered) Figure 3 shows a bimetallic strip with a wooden handle, suspended horizontally
using a thin thread.
The strip is heated at the point shown. Explain why the system tips to the right.(Answered) Giving a reason, name the state of equilibrium of the toy.(Answered) State the principle of moments.(Answered) Figure 6 shows an athlete lifting weights while standing with the feet apart.
Explain why standing with the feet apart improves the athlete’s stability.(Answered)
