A60-kg runner raises his center of mass approximately 0.5 m with each step. although his leg muscles act as a spring, recapturing the energy each time his feet touch down, there’s an average 10% loss with each compression. what must the runner’s additional power output be to account for just this loss, if he averages 0.8 s per stride?
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Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.
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Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.
Answers: 3
A60-kg runner raises his center of mass approximately 0.5 m with each step. although his leg muscles...
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