Recent content by paisiello2

I guess I never thought about 2001 that way but it seems a reasonable interpretation.

Other than they are both about alien contact, I don't see how the plots are the same, even basically. I agree it is creepier, though.

Well, presumably when the bucket hits the ground the water will not stay in the bucket.

How can the spring balance give a value greater than the weight of the block? Maybe show your FBD and your calcs.

I'm not sure but he may have been alluding to dark energy causing the acceleration of the expansion of space. However, my layman's understanding is that this is not a violation of the conservation law.

Yeah, I think you are wrong on that. The red shift comes from the relative speed of the observed light source. Light does not lose energy as it travels.

I'm not sure you really mean 1g here since this is an acceleration.

No one has discovered such a closed system.

Still too small. Just blow up the diagram.

When the system is not closed so that energy can be added or subtracted.

Picture is too small to read.

Maybe you can start by drawing yourself a free body diagram of each condition. You should then be able to apply your kinematic formulae to solve.

No, I want you to put together the formula with the right inputs after the ball hits the wall at point 1.

OK, I guess it might be easier for you to break the problem into two parts. Why don't we call the point where the ball hits the wall "1". Can you put your formula together at point 1?

I assume the question is the time it takes to hit the ground after leaving the wall. I wouldn't say they are independent exactly but you are on the right track with your formula. I would double check your signs and figure out what v0 is.