Why is work done by the earth around the sun zero?
Share
Why is work done by the earth around the sun zero?
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
To be clear, read till end pls.
The revolution of Earth around Sun is considered as a circular path (though it is really elliptical).
It is an example of horizontal circular motion.
Work done in a horizontal circular motion is zero.
The reason behind this is that the velocity is along tangential path and force is centripetal (towards centre).
They are actually perpendicular to each other.
W = F. S where F and S are force and displacement vectors respectively.
W = FScos© where © is theta.