Physics 1028 Study Guide - Final Guide: Joule, Kilogram, Uptodate
Document Summary
The best way to proceed with this problem is to focus on the units of the given parameters. We define as n the number of steps taken during the time interval t. The work per step and per kilogram of body mass is. Note that "step" is not a standard unit, and is therefore not included in the units. The energy dissipation p has the unit j/s with p = 80 j/s; this para-meter is a power term. With the variables defined above we write for the energy dissipation: which leads to the number of steps taken per second: (1) (2) This number allows us in turn to calculate the speed of the person since we know that each step is 1. 6 metres long: (3) When a standard man climbs up a rope, the potential energy of the person changes. To increase the potential energy of the body, work must be done.
