Question

in which segment is the kinetic energy change grea
time (minutes)
d-e
b-c,
c-d
e-f

Explanation:

Step1: Analyze Kinetic Energy Change

Kinetic energy ($KE$) change depends on velocity change. In a graph (likely velocity - time, as time is x - axis), the slope represents acceleration. The steeper the slope, the greater the velocity change (for same time interval), hence greater $KE$ change ($KE=\frac{1}{2}mv^{2}$, so $\Delta KE$ depends on $\Delta v$).

Step2: Evaluate Each Segment

• D - E: Horizontal line, slope = 0, $\Delta v = 0$, $\Delta KE = 0$.
• B - C: Horizontal line, slope = 0, $\Delta v = 0$, $\Delta KE = 0$.
• C - D: Steepest slope (from graph), so $\Delta v$ is greatest here, hence $\Delta KE$ is greatest.
• E - F: Slight slope (less steep than C - D), $\Delta v$ less than C - D.

Answer:

C. C - D