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Homework Help: 1-D kinematic Problem

  1. Oct 14, 2013 #1
    I'm confuse by what the question is asking as far as the conversion (km/hr/s). Can any please help me?

    1. The problem statement, all variables and given/known data

    A jumbo jet must reach a speed of 240 km/hr on the runway for takeoff. What is the minimum constant acceleration (in km/hr/s) needed for takeoff from a 1.34 km runway? (3 sig fig)

    2. Relevant equations

    3. The attempt at a solution


    a=(240 km/hr)^2/2(1.34 km) = (57600 km^2/hr^2) / (2.68 km) = 21492.53731
  2. jcsd
  3. Oct 15, 2013 #2
    Ignore this question. Finally solved it!
  4. Oct 15, 2013 #3
    Your answer is correct, in ##km/hr^2##!!!......you want to convert units???....

    $$21492.53731\frac{km}{hr^2}=21492.53731\frac{km}{hr^2}*\frac{1 hr}{60 min}*\frac{1 min}{60 sec}=??? \frac{km}{hr.sec}$$

    Remember only three significant figures.

    Edit : I guess you solved it!!!
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