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November 28, 2014

November 28, 2014

Posted by **anonymous** on Wednesday, September 20, 2006 at 12:30am.

If Joe rides south on his bicycle in a straight line for 15 min with an average speed of 12.5 km/h, how far has he ridden?

It takes you 9.5 min to walk with an average velocity of 1.2 m/s to the north from the bus stop to the museum entrance. What is your displacement?

How would I solve these problems?

Ok, their velocity is .98m/s due east. The time required is 34min, so how many seconds are there in 34min? 34min * 60sec/min

Use d=v*t where v=.98m/s and the t you calculated above.

If Joe rides for 15min then that is what part of an hour? 15min*1hr/60min= ?

Now use d=v*t =12.5km/hr * the time you just calculated.

If it takes 9.5min how many seconds is that? 9.5min * 60sec/1min = ?

Now use d=v*t = 12.m/s * the time you calculated.

One of the main lessons with these problems is to make sure that your units match. Hours, minutes and seconds are units of time, but the units must match when doing calculations.

Show your work when you repost.

- physics -
**Anonymous**, Thursday, September 10, 2009 at 7:30pmif joe rides south on his bicycle in a straight line for 15 miniutes with an average speed of 12.5 km/h, how far has he ridden

- physics -
**asmir**, Thursday, September 12, 2013 at 7:52pm3.125 km

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