A planet is at point X where its distance from the Sun is and at point Y where its…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A planet is at point X where its distance from the Sun is

1.0\,\text{AU}

and at point Y where its distance from the Sun is

0.7\,\text{AU}

. Ignoring any numerical calculation, which statement about the planet’s speed

v_X

at X and

v_Y

at Y is correct? (a)

v_X=v_Y

(b)

v_X>v_Y

(c)

v_X<v_Y

(d)

v_X = 1.7\,v_Y