Recent content by Tracee

Thanks - especially for pointing out my error. My notes have the 10 and that's what I've been working with, but you've shown how easily I can leave something vital out. This really isn't my area and I'll be glad when this subject is done - at least the physics, maths and chemistry part. The...

Q = C (90pF) x V (25 volts) 90 x 10e-12 x 25 = 2.25 x 10e-9 Coulombs (2.25nC) I get this equation for charge but my maths is letting me down. How do I get from 90pF (90 to power of -12) x 25 = 2.25 x 10 to power of -9 I don't know the working out with negative exponents. I may have to duplicate...

Thanks all. I will keep with it and see how I go, but honestly it's a unfamiliar world to me. Just hope I get the right formulas! I think I need to base it on a single fall to the ground at rate of gravity. Am I right in thinking I need to give the person a weight?

I need help. I have no physics background so need the simplest of answers. I have a question to answer - about the damage that might be caused to a person falling 0.4m off a step. The questions doesn't ask for specific calculations but ask for concepts of force, acceleration and gravity to be...