PHYSICSWk1.pdf Phys 1301W-100
U of M
Popular in Physics for Scientists and Engineers I
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This 2 page Class Notes was uploaded by Chiong Yang on Friday September 11, 2015. The Class Notes belongs to Phys 1301W-100 at University of Minnesota taught by Vlad Pribiag in Fall 2015. Since its upload, it has received 36 views. For similar materials see Physics for Scientists and Engineers I in Physics 2 at University of Minnesota.
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Date Created: 09/11/15
PHYSICS 1301W Lecture Notes Week 1 9915 Significant Figures 0002 1 sigfig 0200 3 sigfigs 2020 4 sigfigs trailing zeroes are significant leading zeroes are not Conversions How many miles are traveled in 2 hours if a car is traveling at a 60 miles hour 60 mileshour x 2 hours miles hour unit cancels out and leaves you with 60 miles x 2 120 miles Order of Magnitude Estimates Making volume estimates Volume of an elephant Volume of a snail 16m36cm3 x 100cmm3 3x106 your answer has no units because they canceled out Kinematics Greek kinema meaning movement motion Motion Position speed velocity acceleration time Relative to a frame of reference origin amp set of axes Position Location with respect to a reference point origin Requires direction amp magnitude Displacement I Change in position I Vector that points from initial to end I Not the same as distance travelled Distance is the length of an actual path always scalar Formulas Average speed Total distance travelled Total time of travel Average velocity Displacement Total time travelled Ex Joe is travelling from Houston to Kansas City which is 1000 km north of Houston He travels 22 hours to Minneapolis which is 700 km north of Kansas City and rests there for half an hour Then travels 13 hours to Kansas City a What is the average velocity of the trip ANSWER 25 x 102 kmhr north b What is the average speed of the trip ANSWER 6 x 102 km hr
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