WAEC - Physics (2018 - No. 6)
A dam is able to hold a large quantity of water because its wall is
thickest at the top
thickest at the middle
thickest at the bottom
of the same thickness throughout
คำอธิบาย
The pressure of the water is much greater deeper down and the dam needs to be thick at the bottom so that it is strong enough to withstand this larger pressure.