Question

The work done by the Sun's gravitational force the Earth is​

Answer 1

Answer:

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° =0

Thereby F∗S∗cos90° =F∗S∗0 = 0

HENCE NO WORK IS DONE .

Answer 2

Answer:

heyy.........

When potential energy of the object increases, the work done by gravity on the object is negative. When potential energy decreases, the work done by the gravity is positive. From perihelion to aphelion, the potential energy of the planet has increased, therefore the work done by the gravity is negative.

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