While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 watts during a race, how fast is the person running? Assume a running step is 1.5 m long
2.92 m/s
You might also like to view...
Interstellar dust scatters _____________light more than _____________light
Fill in the blank(s) with correct word
A(n) ______ grid layout uses a combination of percentages and fixed limits to adapt page elements by size and position.
A. adaptive B. contextual C. fluid D. responsive
An electron moves in a region where the magnetic field is uniform, has a magnitude of 60 ?T, and points in the positive x direction. At t = 0 the electron has a velocity that has an x component of 30 km/s, a y component of 40 km/s, and a z component of zero. What is the radius of the resulting helical path?
A. 4.7 mm B. 18 mm C. 3.8 mm D. 2.8 mm E. 5.7 mm
A car originally traveling at 30 m/s manages to brake for 5.0 seconds while traveling 125 m downhill. At that point the brakes fail. After an additional 5.0 seconds it travels an additional 150 m down the hill. What was the acceleration of the car after the brakes failed?