Compare two collisions that are perfectly inelastic. In case (A) a car traveling with speed V collides head-on with a sports car having half the mass and traveling in the opposite direction with twice the speed. In case (B) an identical car traveling with the same speed V collides head-on with a light truck having twice the mass and traveling in the opposite direction with half the speed
3
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Significant Figures: What is 
expressed to the correct number of significant figures?
Fill in the blank(s) with the appropriate word(s).
A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting effects of air, when the package hits the ground the horizontal location of the plane will
A) be behind the package. B) be directly over the package. C) be in front of the package. D) depend on the speed of the plane when the package was released.
Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 6.0 s?
A. 20 m B. 40 m C. 60 m D. 80 m E. 100 m
Addition by 1. Components: Vector 
has a magnitude of 8.0 m and points 30° north of east; vector 
has a magnitude of 6.0 m and points 30° west of north; and vector 
has a magnitude of 5.0 m and points 30° west of south. The resultant vector 
+ 
-5.0px;" /> + 
is given by
A. 2.7 m at an angle 74° north of east.
B. 5.9 m at an angle 74° north of east.
C. 4.8 m at an angle 74° east of north.
D. 5.1 m at an angle 74° north of east.
E. 2.1 m at an angle 66° east of north.