Homework Help: Physics

Posted by y912f on Friday, January 30, 2009 at 6:27pm.

please show me how to solve these:
1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway?
answer=3.00 h
2. How much time would Simpson save by increasing his average velocity to 56.0 km/h to the east?
answer=0.43 h

Physics - bobpursley, Friday, January 30, 2009 at 6:34pm
distance=rate*time

time= distance/rate
Physics - y912f, Friday, January 30, 2009 at 7:15pm
so i got the first one. but for the second one i did: t=144/56 and i got 2.57..i guess that is in hours..how would i change that to seconds?
Physics - y912f, Friday, January 30, 2009 at 7:35pm
nevermind...the answer is .43HOURS..how did i get 2.57 hours...this question is really bothering me

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