Physics 163

Unit 5: Work, Energy and Power

Problem Set C

 

Problem 1:

A car is moving across a level highway with a speed of 32.1 m/s. The brakes are applied and the wheels become locked as the 1124-kg car skids to a stop. The braking distance is 122.4 meters. Determine the braking force (in Newtons) acting upon the car. 

 

 

 

 

 

0.5 • m • vi2 + m • g • h i + F • d • cos = 0.5 • m • vf2 + m • g • h f

 

 

General information about work and energy problems is described on the Set C Overview page.

A detailed discussion of how to analyze physical situations using work-energy bar charts is provided online at The Physics Classroom.

A detailed description of the work-energy relationships for situation in which external forces are doing work is provided online at The Physics Classroom.

 

Return to: Set C Overview Page || Audio Help Home Page || Set C Sample Problems

Audio Help for Problem: 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || 9 || 10 || 11 || 12 || 13 || 14

Retrieve info about: Audio Help || Technical Requirements || Usage Policy || CD-ROM

Return to: Physics 163 Problem Set Page || Physics 163 Home Page