Measure the vertical distance from the ground floor to the landing and from the landing to the 1st floor as shown below (convert to feet). Record this value on the data sheet, column B.  Note:  Your stairs might not have a landing – that’s ok.  Just measure the vertical height from the bottom to the top of the stairs.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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  1. Measure the vertical distance from the ground floor to the landing and from the landing to the 1st floor as shown below (convert to feet). Record this value on the data sheet, column B.  Note:  Your stairs might not have a landing – that’s ok.  Just measure the vertical height from the bottom to the top of the stairs.
    1. Record your weight (pounds) in column A of the data sheet. Multiply column A and column B.  Record this value in column C.
    1. Measure the time it takes to walk (at a normal pace) up the stairs from the ground floor to the first floor – use the hand rail for support.  Measure 3 times and calculate the average time.  Record these values in column D.
    2. Measure the time it takes to briskly walk (not run) up the stairs from the ground floor to the 1st floor – use the hand rail for support.  Measure 3 times and calculate the average time.  Record these values in column E.
    3. Calculate the power it took to walk and to hurry from the ground floor to the 1st floor.  Enter your calculation in column F and G respectively.
    4. Answer the questions.
    5. Email your exercise to the instructor.

Data Table for Stairs/Work/Power Exercise

A

B

C

D

E

F

G

Weight (lb)

Vertical Height (ft)

Work Done (ft*lbs)

Time

Walk (sec)

Time

Hurry (sec)

Power Calculation

Walk (hp)

Power Calculation

Hurry (hp)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Avg Time

 

 

 

 

 

CALCULATIONS:

Power = Work/Time       Conversion: 1 ft*lb/s = 0.00182 horsepower

Walk:

Hurry:

QUESTIONS:

  1. How is work related to the time to walk and hurry up the stairs?
  2. What part does weight play in the exercise?
    1. Do you do more work if you are heavier?
    2. Do you exert more power if you are heavier?
  3. How is time related to power?

 

ANSWERS:

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