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the earth moves around the sun …

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the earth moves around the sun in a nearly circular orbit how much work is done by gravitational force of the sun on the earth and why

Posted by Palak Bishnoi 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Arpit Bareth 3 years, 10 months ago

Work done is equal to zero assuming earth revolves around the sun in a perfect circle. As Work=Force∗Displacement∗cosθ Where θ is the angle between force and displacement . In this case θ=90degree As centripetal force is involved where earth is pulled towards the sun and direction of motion at each point is tangential to the orbit and as tangent makes 90degree with radius θ=90degree Cos90o=0 Thereby F∗S∗cos90=F∗S∗0=0 HENCE NO WORK IS DONE .

Yogita Ingle 3 years, 10 months ago

Work done is equal to zero assuming earth revolves around the sun in a perfect circle.

As Work=Force∗Displacement∗cosθ

Where θ is the angle between force and displacement .

In this case θ=90degree

As centripetal force is involved where earth is pulled towards the sun and direction of motion at each point is tangential to the orbit and as tangent makes 90degree with radius θ=90degree

Cos90^o=0

Thereby F∗S∗cos90=F∗S∗0=0

HENCE NO WORK IS DONE .

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