A cargo truck is being loaded with heavy crates. Safety regulations state that the heaviest cargo must be placed on the floor of the truck cabin rather than stacked high near the roof.
Why is this?
Stacking heavy cargo high raises the centre of mass, making the truck less stable.
Stacking heavy cargo high lowers the centre of mass, making the truck more stable.
Stacking heavy cargo high decreases the overall mass of the truck, reducing its road grip.
Stacking heavy cargo high increases the kinetic energy of the truck at any given speed.
19 exam-style questions on CIE IGCSE Physics 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.