Recent content by Alyssa Eiger

@scottdave @Orodruin - thank you for your invaluable input. Initial States: 6KG Block: If I set the 6-kg block at t=0 to be location zero, with a potential energy of zero - then all my energy at that point in time for the block is KE (1/2*6kg*4m/s) = 12 Joules. 4KG Block: At the initial...

https://twitter.com/wrongedauthor/status/1001147259503890432

Homework Statement Two masses are connected by a string that is passed over a massless pulley. At t=0, the 6-kg mass is moving upwards at 2m/s, while the 4-kg mass is descending at the same speed. How far will the 6-kg mass rise before it stops? Homework Equations KE= 1/2*m*v^2 PEg: m*g*h...

It would be easiest to solve this using forms of energy - at the top, before the safe falls and it's hanging from a rope, the system has only Potential Energy - Gravitational (formula: m*g*h). Once it falls, after it has compressed the spring, it has Potential Energy - Spring (formula...

Thank you GNeill. I will be sure to keep formatting in the future. AE

UPDATE: this should read: "- Book 2 on Book 1: (2kg)*(10m/s^2)*(.04m) = .8 J"

1. I'm trying to calculate work it takes to lift 4 books, and stack them on top of each other in a 20 cm high stack. The problem reports: - 5 books are lying on the ground. They are each: 2kg, 4cm thick. Using the formula for Potential Energy (mgh), my calculations reflect it takes 8J: - Book...

Hello, I'm a Physics student joining this forum in the hopes of participating in an online community and culture, to learn more about the topic and learn on a deeper level.