PizzaIsYum

This page lists questions and answers that were posted by visitors named PizzaIsYum.

Questions

The following questions were asked by visitors named PizzaIsYum.

A large engine with mass of 400 kg must be lifted 3 meters out of a truck for repair. A normal mechanic can lift with about 250 N of pulling force. They use a system of pulleys to do this. If we assume the engine starts on the ground, how long must the ro...

Answers

The following answers were posted by visitors named PizzaIsYum.

Thanks everyone! I think those answers make sense. I ended up doing something a little different though. First I found the velocity using 1/2mv^2i+mghi=1/2mv^2f+mghf and got v=7.7m/s Then I plugged that into W=change in KE or 1/2mv^2f-1/2mv^2i = Fd and go...

Oh but does the way that I did it count too? I think I might still be quite confused.