APFIVE Force from Momentum Function
The momentum of a system is given by $$p(t) = 2t^3 - 3t^2 + t$$ (in kg·m/s). During which time interval is the net external force negative?
A
t > 1.0 s
B
t < 0.5 s
C
The force is never negative
D
0.5 s < t < 1.0 s
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