Question

A Review You're assisting a cardiologist in planning a stress test for a 80 kg patient. The test involves rapid walking on an inclined treadmill, and the patient is to reach a peak power output of 350 W. If the patient's maximum walking speed is 7.3 km/h , what should be the treadmill's inclination angle? To enter units of degrees, type "deg" in the Units box. Express your answer to two significant figures and include the appropriate units.

Answer 1

If the treadmill is inclined, then the gravitational force component acting along the incline is

a = gsin

The force acting on the patient is

F=ma = mgsind

The speed in m/s is 2.03 m/s. The power is given by

P = Fu = mav = mgusino mgu 350 sino = 80 x 9.8 x 2.03 A = 13°

This is the answer.