Recent content by d-richard

I see. So Actually i was supposed to use integration to find the moment of inertia. Okay that explains a lot. Thanks.

I see. Very useful. Thanks

Thanks a lot. Makes a lot more sense

Greetings, I was thinking about bouncing a tennis ball against a wall and how its momentum and kinetic energy would change. I asked a friend of mine and he answered that the ball would transfer more forward momentum than it had to the wall but its kinetic energy would remain constant. How is...

Ok. I know it is wrong as when someone enters the value obtained for the answer it is corrected automatically by an online program.In calculating pi is 3.14159265358979 I used colours to guide the eye: red is for numbers related to the question, orange is for the general formula, pink is for...

Ok. Here's the what I did: I first calculated the angular velocity by dividing 2pi by the time taken, 0.3 since the total angle covered was 2pi radians and I want the angular velocity. Then I squared my velocity, multiplied it by the square of the radius, 0.36 (r=0.6) and then by the mass 18...

Isn't the formula for rotational kinetic energy 1/2Iw^2 with I the moment of inertia equal to the mass multiplied by the square of the lever arm, which in this case is the radius?

I get mostly websites explaining that the angular velocity is equal to the angle moved over time. I guessed that the velocity should then be equal to (2pi/t)rad/s since the angle is equal to 2pi radians. But I'm not sure because when I tried entering the answer it termed it wrong. Maybe I made a...

Greetings, I fell upon a certain question and it seemed that no matter what I did I was unable to solve it. I wished to know how if given a radius of 0.6m and the time for one revolution: 0.3s, to find the angular velocity in radians of the object. Consider it to be a point particle. Thanks

Greetings, I am brand new to quantum physics. By that I mean I have no idea of the mathematics and know terribly little about the physics. In fact my best background comes from the book QED by Richard Feynman. Anyway, I do know that there are four fundamental forces which have force-carrying...

thanks, that really clarifies things. Great video

thanks for the links, and yeah I forgot that circles are ellipses. Thanks for reminding me

Greetings, I've been learning about special relativity and most of the learning media included a part of general relativity. From that I learned that space-time is curved and orbits are nothing more than an object following a path in 4D. However I do not understand how those objects may rotate...

Greetings, I read a chapter in the book College Physics by Vuille and Serway explaining the laws of planetary motion in terms of the universal law of gravitation. The first law stated that planets move in an elliptical orbit and the book's explanation was that all objects bound by an...