Most popular questions and responses by PizzaIsYum
  1. Physics

    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

    asked on September 23, 2016
  1. Physics


    posted on September 24, 2016
  2. Physics

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

    posted on September 23, 2016
  3. Physics

    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 got

    posted on September 23, 2016