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Question

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Answer 1

v(t)=A(1-e^(-t/7s))

v(2.6s)=28m/s=A(1-e^(-2.6s/7s))=>A~40.59m/s

v(t)=40.59m/s(1-e^(-t/7s))

v'(t)=a(t)=40.59m/s(e^(-t/7s)/7)=>a(0)=40.59/7 m/s

As t->inf,v(t)->A=40.59m/s. Since as t->inf => e^(-t/7s)->0

As t-> inf , a(t)->0