Mechanical Energy & Work Quiz (AON) - AP Physics 1 1. As shown below, a 10 kg sled on a horizontal surface has four
forces (F3, FN, Ff, T) acting on it. The sled is initially moving to
the right at 5 m/s and then moves 2 m to the right.
a) Explain why the normal force does no work on the sled.
b) Calculate the final velocity of the 10 kg sled.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.