Answer
(d) December 21
Work Step by Step
Since by conservation of angular momentum,
$L=mvr$.
m is constant.
So, if r decreases, speed of earth will increase.
On December 21, distance is minimum, so speed is maximum.
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 8 - Rotational Motion and Equilibrium - Learning Path Questions and Exercises - Multiple Choice Questions - Page 301: 18
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