Question

Assume that Earth is in circular orbit around the Sun with kinetic energy K and potential energy U, taken to be zero for infinite separation. Then, the relationship between K and U:

Answer 1

K= -U/2

Step-by-step explanation:

We know that K.E = 1/2mv²

And -GMm/r²= mv²/r

Thus K,E= 1/2(GMm/r)= 1/2(-P.E)

So

P.E = - GMm/r

So K= -U/2