Physics 163

Unit 5: Work, Energy and Power

Problem Set B

 

Problem 7:

Esteemed Chinese ski jumper, Li Ping Phar, leaves the jump ramp with a kinetic energy of 16046 Joules and a potential energy (relative to the bottom of the ski hill) of 12836 Joules. She encounters -2052 Joules of work due to air resistance during her flight through the air. Determine her kinetic energy (in Joules) the instant prior to striking the ground at the bottom of the hill. 

 

 

 

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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