Science Lecture 4:


Basic Formulas in Elementary physics:

v= u + at ----- Acceleration formula

W= FD ----- "Work" Formula or "Footdrill formula"

F=ma ----- Newton's 2nd law

P = W/t ----- Power formula

P= F/ A ----- Pressure formula

F = kD ----- Spring Formula (Hooke's Law)

D = M/V ----- Density formula

E = mgh ------ Potential Energy Formula

E= ½ mv2 ------ Kinetic Energy formula (By the way it is "v squared")

W= mg ------ Weight Formula

P = hdg ------ Pressure in Liquids (like you noe, sea pressure.....)

Btw, this is how the last formula was derived:

P = F/A
= W/A (because the force exerted by the liquid is the weight of the liquid)
= (h x A x g x d)/ A (h is the height of the liquid, A is the base area, g is gravity,
d is density)

= h x g x d

therefore, P = hgd

We can also conclude that the "height" of liquid is the depth. Hence, the pressure exerted by a liquid depends on the depth, Density, and gravity if you're not on earth.

Tat's all.