The relative speed of an object:
, where v is the speed of the object and v0 is the speed of the observer.
1) Anita is running to the right at 5.0m/s , as shown in the figure. Balls 1 and 2 thrown toward her at 10m/s by friends standing on the ground.(Figure 1)
a. According to Anita, what is the speed of the first ball?
b. According to Anita, what is the speed of the second ball?
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