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