A16.7 kg block is dragged over a rough, horizontal surface by a constant force of 132 n acting
at an angle of 25.8. above the horizontal. the block is displaced 57,8 m, and the coefficient of
kinetic friction is 0.229. find the magnitude of the work done by the force of friction. answer in
units of j.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

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.

An object in mechanical equilibrium is an object