kkelley
New member
So - I am taking the Mechanical PE in April and started studying using the MERM. One thing that keeps coming up (and totally confusing me) is that the equations appear to be different (than from what my college textbooks have) regarding the gravity constant. This comes up in many equations (force eqn's, kinetic energy, potential energy, etc...). For example, the work done by gravity would typically be m*g*z (where z is the change in elevation) but in the MERM equation 23.9, it is m*z and the g drops out of the equation. One other example: F=ma...but the MERM has F=m*a/g (Eq. 56.12).
I am sure there is a very good explanation why these equations are seemingly all different than my college texts...could someone please explain?
I am sure there is a very good explanation why these equations are seemingly all different than my college texts...could someone please explain?