Physics 163

Unit 5: Work, Energy and Power

Problem Set B

 

Problem 10:

A 631-kg roller coaster car is lifted to a height of 47 meters above the ground where it begins its descent from an initial rest position. If -10523 Joules of work are done on the car as it descends the first hill to ground level, then what is its kinetic energy (in Joules) at the bottom.  

 

 

 

 

 

Use the equation below to solve this problem. Cancel terms, substitute and solve.

 KEi + PEi + Wnc = KEf + PEf

 

Work and energy principles and mathematical relationships can be reviewed on the Set B Overview page.

Further information about the work and energy relationship is available online at The Physics Classroom.    

 

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