Question: A (2.3-mathrm{kg}) object experiences a single, time-dependent force (F_{x}(t)=(10 mathrm{~N} / mathrm{s}) t-(20 mathrm{~N})). What is the object's acceleration at (t=0,2.0 mathrm{~s}), and (4.0 mathrm{~s})

A $2.3-\mathrm{kg}$ object experiences a single, time-dependent force $F_{x}(t)=(10 \mathrm{~N} / \mathrm{s}) t-(20 \mathrm{~N})$. What is the object's acceleration at $t=0,2.0 \mathrm{~s}$, and $4.0 \mathrm{~s}$ ?

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