An asteroid orbits the Sun in an ellipse of eccentricity

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

0.45

. At perihelion it is

1.1\times10^{11}\,\text{m}

from the Sun and its speed there is

52\,\text{km}\,\text{s}^{-1}

. (i) Find the semi-major axis of the orbit. (ii) Calculate the speed of the asteroid at aphelion.