Aplanet orbits a star, in a year of length 4.34 x 10^7 s, in a nearly circular orbit of radius 1.42 x 10^11 m. with respect to the star, determine
(a) the angular speed of the planet,
(b) the tangential speed of the planet, and
(c) the magnitude of the planet's centripetal acceleration.

Explanation:

It is given that,

Time taken by a planet to orbit a star,

Radius of circular orbit,

(a) Angular speed,

(b)  Tangential speed of the planet,

v = 20448 m/s

(c) Centripetal acceleration of the planet,

Hence, this is the required solution.

3.2x10^7

the part of the wave he is travelling on is the crest