AAMC Test 3 B/B #4

sarita0518
Posts: 143
Joined: Fri Feb 22, 2019 3:08 pm

AAMC Test 3 B/B #4

Can you please tell me how to interpret the graph and why A is correct?
NS_Tutor_Will
Posts: 766
Joined: Fri May 25, 2018 9:15 am

Re: AAMC Test 3 B/B #4

How were you thinking about this one? I'll try to address the graph generally, but it's easier to address if I know exactly where you confusion arose from -- that way I can target my response more specifically instead of aiming super broad.

The graph shows a muscle power curve (as in how does the power exerted by a muscle change) as well as a curve plotting the force generated by the muscle (x axis) and the retraction velocity (y axis).

Since work is equal to power x time and we're told that the duration of the contraction is the same, we can just choose whichever point has the smallest power and that'll be our answer. Point A has the smallest power and so is correct.

I hope this helps!
sarita0518
Posts: 143
Joined: Fri Feb 22, 2019 3:08 pm

Re: AAMC Test 3 B/B #4

I was confused a the two slopes (shape ) of the graph - I did not know which part (A,B,C,D) referred to in the muscle contraction.

I assumed A was right because it was smallest, I was not sure about D though because it seemed to be a negative slope
NS_Tutor_Will
Posts: 766
Joined: Fri May 25, 2018 9:15 am

Re: AAMC Test 3 B/B #4

Oh, I see. So slope isn't relevant here, it's just the coordinates on the y-axis and choosing the correct graph from the label on the graph itself. We want to choose whichever y-coordinate is the smallest since that'll correlate with the lowest power.
sarita0518
Posts: 143
Joined: Fri Feb 22, 2019 3:08 pm

thank you!