A mass of 2 kg traveling at 3 m/s undergoes a one-dimensional elastic collision with a group of four 1-kg masses that are at rest in contact with each other and lined up in the same direction as the velocity of the 2-kg mass
As a result of the collision A)
the 2-kg mass comes to a stop and one of the 1-kg masses takes off at 6 m/s.
B)
the 2-kg mass comes to a stop and two of the 1-kg masses take off at 3 m/s.
C)
the 2-kg mass comes to a stop and three of the 1-kg masses take off at 2 m/s.
D)
the 2-kg mass comes to a stop and all four of the 1-kg masses take off at 2 m/s.
E)
the 2-kg mass and the five other masses travel at 1 m/s.
B
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Two cars are traveling down the highway in the same direction. Car A is traveling at 30.0 m/s and car B is passing car A at a relative speed of 3.0 m/s. Using Galilean relativity to calculate the speed of car B relative to the highway results in an answer incorrect by how many m/s?
a. 
b. 
c. 
d. 
e. 