A 1000-kg helicopter hovers over a forest fire and starts to squirt water downward with a speed of 10 m/s at a rate of 40 kg/s. What is the initial upward acceleration on the helicopter when it first starts to release the water?
A)
2.5 m/s2
B)
0.40 m/s2
C)
0.25 m/s2
D)
4.0 m/s2
E)
5.0 m/s2
B
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