52. The graph below represents the velocity of an object traveling in a straight line as a function of time. Determine the magnitude of the total displacement of the object at the end of the first 6.0 seconds. 
Base your answers to questions 53 and 54 on the information below.
A 65kilogram polevaulter wishes to vault to a height of 5.5 meters. 53. Calculate the minimum amount of kinetic energy the vaulter needs to reach this height if air friction is neglected and all the vaulting energy is derived from kinetic energy. [Show all work, including the equation and substitution with units.] 
Base your answers to questions 55 through 57 on the information and vector diagram below.
A dog walks 8.0 meters due north and then 6.0 meters due east. 55. Using a metric ruler and the vector diagram, determine the scale used in the diagram. 
Base your answers to questions 59 and 60 on the information and diagram below.
A 10.0meter length of copper wire is at 20°C. The radius of the wire is 1.0 × 10 ^{–3} meter. 59. Determine the crosssectional area of the wire. 
