Recent content by Dragonetti

For the velocity I used D/t. For t I used the time the ball was between two points. So I think this must be the average velocity?

Thank you for the replies. OK I now have the equation Pe = Ke + (1/2)Iω^2 Which I have rearranged for "I" (M(2gh - v^2))/ω^2 = I I found the velocity and ω as suggested. I have then use this to find I. Is this correct? I have tried it with different balls (tennis ball, ball...

Homework Statement Hi, I have been asked to find the moment of inertia of a rolling ball. The ball can be any size and radius. I have chosen a solid ball. The experiment says that I should roll the ball down a ramp and then measure the time it takes for the ball to roll from the end of...

Hi Thanks for the help much appriciated, I think I have worked it out, answer below; -4/9(1-x3)3/2 du? I have differentiated it and I get back to original answer. Just one thing, if my original limits were 2,1 would my new limits be -7,0? Thanks again Dominic

Homework Statement Hi I am having a few problems with the below u substitution can anyone help, In particular what to do with the integral of the u substitution? Homework Equations \int2x2 square root of 1-x3 dx, u = 1-x3 Any pointers would be appreciated Thanks D

Hi, I have a question regarding curve sketching. I am fairly competent in sketching curves from a function, i.e. x2+2x, etc. But how would I go about getting the function of a curve? Lets say I sketched a freehand curve , Would I have to draw a set of axes onto the curve and then take...

Homework Statement Hi, This isn't a homework question, I am having a bit of trouble with some Trig equations. If you are worried that you are answering a homework question please give me the solution to a similar question. Homework Equations When we have a trig equation like sec2X + tan2X =...

Thanks Very helpful Dominic

Thanks for the help, Dominic

Hi, I am stuck on a specific part of an equation, the equation is as follows; Simplify (x^1/2 +1) (x^2 - x -2) (x -2)^-1 I am basically stuck on the last part (x -2)^-1, how would I go about simplifying this. Help would be appriciated Dominic

Hi, I have a question regarding the types of decay and the time of decay for an atomic nucleus. Do all nuclei have a set decay time and method, (by method I mean Alpha, Beta, Gamma decay). i.e. does Uranium only decay via beta decay over a set time? Or can an nucleus decay by any of the...

Could it be that we perceive only 3 spatial dimensions as this is the minimal amount of dimensions that we need to exist? There are more dimensions but we do not observe them because we don’t need them. Similar to the electromagnetic spectrum, we only observe the light part of the spectrum as...

Hi Frannas, Thanks for the reply, very helpful

Hi thanks, The weights are solid metal.

Hi, I am new to physics and the physics forum, I have a question. I have a series of weights, 2kgs, 4kgs, 6kgs etc, held 10 meters above the ground. How would I work out the speed and therefore time it takes for the weight to fall to the ground? Also, how would I work out the...