While the gondola is rising at a speed of 5.0 m/s, a passenger in a balloon-supported gondola throws a small ball up at a speed of 2.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
A. 2.0 m/s, up.
B. 2.8 m/s, down.
C. 3.0 m/s, up.
D. 5.0 m/s, up.
E. 7.0 m/s, up.
Answer: E
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Fill in the blank(s) with correct word
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