Vertical Leap – Horsepower Experiment                                      Name: _________________________

 

Instructions:  You may use your own vertical leap height or you may use that of another student.  All work must be shown on the back of the sheet.

 

1.  Find body height in ft, inches, cm, m, :   (use conversions found at bottom of page):

 

_____________ ft     _______________in   _______________cm  ___________________m

 

2.  Find vertical leap height in inches, m, cm,

 

_____________ in    _______________ ft  _______________ cm ____________________m

 

 

3.  Find fall time from apex  [ using t = √ (2 d / g )  ]

 

  ______________________s

 

 

4.  Find takeoff/landing velocity     [  V_f  = √ (2 g d )   ]

 

______________________ m/s

 

 

5.  Convert body weight from pounds to newtons:   ________________lb  =  ________________N

 

 

6.  Find power generated   [  P =  (wgt. x  fall distance) / fall time ]  in both watts and ft-lbs

 

________________________watts                   ___________________ ft-lbs

 

 

7.  Convert both answers to horsepower and convert watts to kilowatts:

 

 

_______________________hp               _____________________kW

 

 

 

 

 

 

2.54 cm = 1 inch

12 inch = 1 foot

3.28 feet = 1 meter

100 cm = 1 m

1 N = 0.225 lb

1 kg = 9.8 N = 2.4 lb

1 slug = 32 lb

1 horsepower = 550 ft-lb/s

1 horsepower = 745.7 watt