Find the kinetic energy k of a satellite with mass m in a circular orbit with radius r. express your answer in terms of m, m, g, and r.

Explanation:

The kinetic energy is defined as:

Here, m is the object's mass and v its speed. In this case the speed of the satellite is the orbital speed, which is given by:

Here, G is the gravitational constant, M is the mass of the object that the satellite is orbiting and R is the radius of its circular orbit. Replacing (2) in (1):

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.