Recent content by Dgolverk

Hi, I need to build a telescope for my physics class. I need to use any 3 lenses(converging or diverging) and 1 mirror. I was thinking of using an achromatic telescope design for that. However I am not sure what kind of lenses to use and whether I should make the eyepiece from two lenses or just...

Thank you very much! :smile:

Therefore Ek at the bottom will equal the same as Eg before release. Ek = 0.5mv^2 Then I need to find v?

Alright! :D So now I need to calculate Eg at h=13.6cm Ek=0 before released. But how do I calculate the speed at the bottom?

I'm really sorry but I'm a bit confused about the wording, if the lowest point is 86.6cm then I just subtract this from 100cm therefore the height of the mass before it is released is 13.6cm? I just can't figure it out. Can you please give me a hint or some further explanation. Thank you for...

So by I found out the vertical distance from the support point is 86.6cm, however it does not make sense, if the length is 100cm wouldn't the height at rest be the same? I can continue from here but I need explanation about the height. Thank you again

Homework Statement Calculate the maximum speed of 100g pendulum mass when it has a length of 100cm and an amplitude of 50cm. Homework Equations I think that Eg=mgh and Ek=0.5mv^2 are related to this problem.The Attempt at a Solution I'm not really sure how to start this problem as I don't know...

Alright I understand. Thanks :)

Oh.. I see. So how can I continue? I'm not really sure what to do next...

Homework Statement Determine the magnitude of the force of gravity acting on a 340 kg satellite, 850km above Earth's surface. Homework Equations So I dedcided to use the Universal Gravitation Law: Fg = (Gm1m2)/d^2 The Attempt at a Solution m1=5.98E24 (earth's mass) m2=340kg...

Hello, I need some help figuring out how to proceed. Homework Statement Make up a ruler, that can measure human reaction time in time intervals of 0.05s. There supposed to be 6 intervals in total. We did a similar experiment in class, where a student drops a ruler and I need to catch it as...

It's supposed to be an equation - y=mx+b Thanks

Hello, I can't understand 2 questions from my math homework can you please explain how I am supposed to do that? 1. Find the equations of the medians of the triangle with vertex coordinates at J(2,-2) K(4,-1) and L(-2,-5). 2. Find the equation of the perpendicular bisector of a chord of...