Solutions to

1-D kinematicsHomework Problems

http://en.wikipedia.org/wiki/Joggling

Convert Marathon Distance to Meters...

CalculateUsain'sTime...

ConvertHaile'stime toseconds...

Haile's Time minus Usain's Time

Convert 24 hr to seconds...

Calculate Owen's Distance...

Not Cheetah Girl

Problem Solving Template Deluxe

a) Use 2nd eq. (a = 4 m/s2)

b) Use 1st or 3rd Eq. (Δx =100m)

Use that one to avoid your answer from part a)!

Use 2nd Eq. (Vf = 24 m/s)

Use 1st or 3rd Eq. (Δx = 96m)

Use that one to avoid your answer from part a)!

Fair Dinkum Mate!...Fair Bloody Dinkum!Problem #         Equation Used              Answer

#1                           #4                                  5.9m/s

#2 a)                      #2                                 44.1m/s      b)                     #3                                   77.2 m      c)                     #3                                  132.3 m        d)                     #2                                 ­29.4 m/s

#3                          #3                                  1372m

#4                          #3, Avg. V                     54.8 mi/hr

#5                          #1+funky            Bonus!        993m

 

topgun

90 m

22.5m2 m

* Key idea is that the slope represents the speed!

*The green dotted lines are also correct but show the object moving in the opposite direction.

* Key idea is that the slope represents the acceleration, and remember we ignore Jerks!