- #1
Jtappan
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1. Homework Statement
The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.7 * 10^12 m from the Sun and moves with a speed of 11.0 km/s. What is the comet's speed at its perihelion (closest approach to the Sun) where its distance from the Sun is 8.4 * 10^10 m?
_____km/s
2. Homework Equations
PEi+KEi=PEf+KEf
3. The Attempt at a Solution
do the m and g values cancel out when doing this because they are not given? I am totally lost...
The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.7 * 10^12 m from the Sun and moves with a speed of 11.0 km/s. What is the comet's speed at its perihelion (closest approach to the Sun) where its distance from the Sun is 8.4 * 10^10 m?
_____km/s
2. Homework Equations
PEi+KEi=PEf+KEf
3. The Attempt at a Solution
do the m and g values cancel out when doing this because they are not given? I am totally lost...