APFIVE Acceleration in an Inertial Reference Frame
A student is on a moving walkway that has a velocity of 1.5 m/s east. The student walks with a velocity of 0.8 m/s west relative to the walkway. A ball is thrown horizontally with a velocity of 10 m/s east relative to the ground. If the ball has a constant downward acceleration of 9.8 m/s², what is the acceleration of the ball as measured by the student?
A
9.1 m/s² in a direction below horizontal
B
9.8 m/s² downward
C
9.8 m/s² downward and 0.7 m/s² west
D
9.8 m/s² downward and 0.7 m/s² east
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