A stone pillar has a mass of 3.0 tonnes, if the area of its base is 0.3m2, calculate the pressure under the pillar.

P = 98100 [N/m2]

Explanation:

To solve this problem we must use the following mathematical expression, which tells us that pressure is the relationship between Force and area.

P = F/A

where:

P = pressure [N/m2]

F = force [N]

A = area [m2]

We must convert the mass from tons to kilograms.

m = 3 [ton] * 1000 [kg/1 *ton] = 3000 [kg]

Force is defined as the product of mass by gravity.

F = 3000*9.81 = 29430 [N]

P = (29430/0.3)

P = 98100 [N/m2]

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6