The moon has a mass of 7.4 × 1022 kg and completes an orbit of radius 3.8×108 m about every 28 days. the earth has a mass of 6 × 1024 kg and completes an orbit of radius 1.5 × 1011 m every year. what is the speed of the moon in its orbit? answer in units of m/s.

To solve this problem it is necessary to apply the kinematic equations of movement description, where the speed of a body is defined as the distance traveled in a given time, that is to say

where,

x = Displacement

t = time

Since the moon is making a path equal to that of a circle, we know by geometry that the perimeter of a circle is given by

At the same time we have that time is equal to

Using the equation for velocity we have finally that

Therefore the speed of the Moon in its orbit is 987.92m/s

c. newton's third law of motion