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June 19, 2013

# Homework Help: physics

Posted by jenna on Saturday, September 24, 2011 at 1:20pm.

A jet travels at 490 m/s.
How long does it take to travel 227m?

• physics - Steve, Monday, September 26, 2011 at 5:02am

look at the units. You want to convert speed to time. So, speed already relates distance to time: m/s

But you want to end up with sec, not m, so divide meters by meters/sec to end up with sec.

m / (m/s) = m * s/m = s

They've only given you two pieces of data, so work with them:

227m / (490m/s) = 227 / 490 s = 0.46 s

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