When a satellite revolves around the Earth with a constant velocity, both its kinetic energy and momentum remain constant.
Kinetic Energy: The kinetic energy of an object is given by the equation K.E. = (1/2)mv², where m is the mass of the object and v is its velocity. Since the satellite is moving with a constant velocity, its kinetic energy remains unchanged. The velocity squared term remains constant, and therefore, the kinetic energy of the satellite remains constant.
Momentum: The momentum of an object is given by the equation p = mv, where m is the mass of the object and v is its velocity. Since the satellite's velocity remains constant, its momentum remains constant as well. The mass and velocity of the satellite do not change during its revolution around the Earth, so its momentum remains constant.
It's important to note that these statements assume the absence of external forces such as drag or gravitational perturbations from other celestial bodies. In reality, the satellite may experience small changes in its velocity and momentum due to these factors, but for the sake of the simplified scenario of constant velocity, we consider them to remain constant.