Question

Please help me find the amount of pressure. Thanks?!!

Answer 1

OK, pressure is defined as being force per unit area, just need to be careful about the units (especially converting `cm^2` to `m^2` etc.)

Explanation:

So `P = F/A` but before we can use that we need the mass expressed as a force (in N) using `w = m xx g`

Step 1: elephant’s weight, `w = m xx g = 6000 xx 9.81 = 58860 N`

Step 2: `P = F/A = 58860 / (0.1 xx 4) = 147150 N/m^2`

I think you’d be better quoting the same number of significant figures as given in the question, so I’d call it 150 000 `N/m^2` depending on the value you take for g (maybe silly of me to use 9.81 in this case!)