PROBLEM 11.141 Racecar A is traveling on a straight portion of the track while racecar B is traveling
on a circular portion of the track. At the instant shown, the speed of A is increasing at the rate of 10
m/s?, and the speed of B is decreasing at the rate of 6 m/s?. For the position shown, determine (a) the
velocity of B relative to A, (b) the acceleration of relative to A.
A=240km/h
B=200km/h with angle 50

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.