Select the correct answer.
Kepler's third law, [tex]P^2=k A^3$[/tex], shows the relationship between a planet's orbital period [tex]$(P)$[/tex] and the length of its semi-major axis [tex]$(A)$[/tex]. Which statement is true about Kepler's law?
A. The orbital period is measured in units of time, and the semi-major axis is measured in units of mass.
B. The value [tex]$k$[/tex] is constant for each of the eight planets in our solar system.
C. For a body orbiting the Sun, increasing the orbital period increases the length of the semi-major axis.
D. To calculate the value of k for a planet in our solar system, find [tex]$A^3+P^2$[/tex] for the planet.
Answer (3)
400/50 = 8 m/s; 400/60 = 6,(3) m/s;
400/50 = 8 m/s 400/60 = 6,(3) m/s ;
The runner's average speed when covering 400 meters in 50 seconds is 8 m/s, and when taking 60 seconds for the same distance, the average speed is approximately 6.67 m/s.
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