The acceleration of a particle is a(t)=t²-7t+12 m/s². At which times is the acceleration zero?
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The acceleration of a particle is a(t)=t²−7t+12 m/s². At which times is the acceleration zero?

G1 Physics · Accepted Answer

Set a=0: t²−7t+12=(t−3)(t−4)=0. Hence acceleration is zero at t=3 s and 4 s.