Unit 5: Work, Energy and Power
Problem Set C
A bowling ball is attached to a 2.3-meter long cable and hung from the ceiling. The cable is kept taut and the ball is raised to an initial height of 1.64 meters above the classroom floor. It is released from rest and allowed to swing as a pendulum. Determine its speed (in m/s) when it is at a height of .76 meters above the floor.
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 total mechanical energy is conserved is provided online at The Physics Classroom.
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