Answer
(a) The instantaneous power is $8800~Watts$
(b) The instantaneous power is $6400~Watts$
Work Step by Step
(a) In general: $Power = F~v$
From the graph, we can see that the force is $800~N$ when the velocity is $11~m/s$. We can find the power:
$Power = (800~N)(11~m/s) = 8800~Watts$
The instantaneous power is $8800~Watts$
(b) From the graph, we can see that the force is $400~N$ when the velocity is $16~m/s$. We can find the power:
$Power = (400~N)(16~m/s) = 6400~Watts$
The instantaneous power is $6400~Watts$.
