Recent content by PhysicsDaoist

Homework Statement This is a classic problem with a slight twist on followon questions - A 1.50-kg bucket of water is tied by a rope and whirled in a circle with a radius of 1.00 m. At the top of the circular loop, the speed of the bucket is 4.00 m/s. a) Determine the acceleration, the net...

I know this is a classic problem. Would someone elaborate a bit more on this one? I am also confused about the energy side of this impulse strikes the rod. I am fine with the conservation of momentum side, basically I understand if the impulse hits anywhere perpendicular to the resting rod...

You are absolutely right, I missed the Mathilin's verbatim restating of the original problem. The frame of reference is at ground level and mgh is definitely needed.

Why is the mgh term still there? I thought the original question was asking one to show Total Energy = 1/2*k*(A2 + ΔL2)

Thank you Dadface. That is clear, my issue was with the wall and I now see where and why I was confused. This another clarification/correction you wrote made me realized that I put down "zero energy loss" on post 9. You are absolutely correct. I can visualize the detail much better now...

Thank you for the replies. I think mathematically, I can work out the answer. Simply from the fact that it is an elastic collision (assuming zero energy loss) And using conservation of energy and conservation of momentum. v1' = (m1-m2)/(m1+m2)v1 v2' = 2 m1/(m1+m2)v1 and if m2 approaches...

I was watching MIT Classical Mechanics Lecture16. On completely elastic collision, (at around 24min), professor Walter Lewin shown that when a tennis ball with mass m and speed v hitting the wall, it bouced back with speed v. (Cut from the lecture) << ...Kinetic energy is conserved. All the...