A 2.0 kg package is released on a 53.1◦
incline, 4.0 m from a long spring with force
constant 120 N/m that is attached at the
bottom of the incline. The coefficient of
friction between the package and the incline
are µs=0.40 and µk=0.20. The mass of the
spring is negligible.
a. Show that...
Yes! 20 m/s seconds was correct. Thank you for clarifying the fact that the normal force is not just mgcos(thetat). I noticed that someone had mentioned that previously, but I had no idea how to explain it. Makes sense now. Thanks to all who helped!
Amazing
Unbelievable! 14.77 was not correct! The method seemed to be completely correct. Thanks for all the help, I really appreciate it. Perhaps there is an error in the online homework server .
Still need help
I tried using some of the suggested methods, and got a smaller answer of 11.17, but it is still not correct. I do not know what else to try. If anyone can perhaps emphasize a post that they know is correct in case I messed up, or provide a totally new approach, it would be...
A highway curves to the left with radius of curvature R = 25m. The highway's surface is banked at 27 degrees so that cars can this curve at higher speeds. Consider a car of mass 1800kg whose tires have a static friction coefficient of 0.62 against the pavement. Take g=9.8. How fast can the...
The Problem:
Your car breaks down in the middle of nowhere. A tow truck weighing 4000 lbs. comes along and agrees to tow your car, which weighs 2000 lbs., to the nearest town. The driver of the truck attaches his cable to your car at an angle of 20 degrees to horizontal. He tells you that...
The system is a 3kg weight on a table top attached to a string leading to a pulley at the end of the table. Attached to the string straight down is a weight with an unknown mass:
( )--------------- 3kg
l...