5. An engine with a mass of 300 kg and an initial temperature of 22 °C takes in 9 x 10' J of energy as heat and does 4 x 10' J of work. The rest of the energy is retained by the engine, which has a specific heat capacity of 533 J/kg•°C. Calculate the engine's final temperature.

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.