At a time t seconds after it is thrown up in the air, a tomato is
at a height (in meters) of f(t) = =4.9t
2 +50t +5 m.
A. What is the average velocity of the tomato during the
first 4 seconds? (Include units.)
B. Find (exactly) the instantaneous velocity of the tomato
at t = 4. (Include units.)
C. What is the acceleration at t = 4? (Include units.)
D. How high does the tomato go? (Include units.)
E. How long is the tomato in the air?
1
Expert's answer
2020-03-13T10:16:09-0400
A. Vˉ=4f(4)−f(0)=30.4cm
B. V(t)=ft′=−9.8t+50 hence V(4)=10.8sm
C. a(t)=Vt′=−9.8s2m
D. Ifτ is time up then V(τ)=0 hence −9.8τ+50=0 then τ=5.1s then f(τ)=H≈132.6m
E. If t is time down then H=2gt2 hence t=g2H≈5.1s then T=t+τ≈10.2s
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