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Unit conversion

  • Thread starter BlueOwl
  • Start date
  • #1
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Homework Statement



The acceleration of a particle is 5 m/s^2. What is the acceleration in Km/hr^2 and ft/hr^2?

Homework Equations



1km=1000m , 1m = 3.28 ft , 1hr=3600s

The Attempt at a Solution



ok so i have answers with calculator which is

5m/s^2 = 64800 km/hr^2 and 212598425 ft/hr^2

I tried doing it by showing the process but i couldnt get the same answer
the square parts confuse me when doing the math can anyone plz show me how to do the
process of getting those answers thanks. for example :

5 x (1 meter / 1 second ^2 )
5 x( ? kilometer / ? hour^2) Like that by replacing and doing the math :D .
 

Answers and Replies

  • #2
Doc Al
Mentor
44,940
1,201
Here's an example of one way to do it:
1 m/s^2 = 1 m/(1/3600 hr)^2 = 1/(1/3600)^2 m/hr^2 = (3600)^2 m/hr^2

Just keep replacing units by their equivalent. Here, 1 sec = 1/3600 hr. When you square a quantity, square both the number and the unit.
 

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