A planet of mass 6 × 1025 kg is in a circular orbit of radius 4...

A planet of mass 6 × 10²⁵ kg is in a circular orbit of radius 4 × 10¹¹ m around a star. The star exerts a force on the planet of constant magnitude 1.8 × 10²³ N. The speed of the planet is 3.4 × 10⁴ m/s.
(a) In half a "year" the planet goes half way around the star. What is the distance that the planet travels along the semicircle?

(b) During this half "year", how much work is done on the planet by the gravitational force acting on the planet?

(c) What is the change in kinetic energy of the planet?

(d) What is the magnitude of the change of momentum of the planet?

Expert Solution

genius_generous answered 2 years ago

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