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Author Question: Lisa runs up 4 flights of stairs in 22. seconds. She weighs 510. Newtons. If each flight rises 310. ... (Read 127 times)

sc00by25

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on: Jul 29, 2018
Lisa runs up 4 flights of stairs in 22. seconds. She weighs 510. Newtons. If each flight rises 310. cm:
 
  (a) What is her change in potential?
  (b) What average power (watts) was required during the 22. s?
  (c) What minimum horsepower motor would be required to do this?

Question 2

There are 640 acres in a square mile, and 5280 feet in one mile. How many acres are there in a hectare, a square one hundred meters on each side?
 
  What will be an ideal response?


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sylvia

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Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 6.32 kJ
(b) 287. watts
(c) 0.385 hp

Answer to Question 2

2.47 acres


sc00by25

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Reply 2 on: Jul 29, 2018
:D TYSM

ryhom

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Reply 3 on: Yesterday
Excellent

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