A geostationary satellite must have an orbital period exactly equal to the Earth's sidereal rotation period, which is approximately 23 hours, 56 minutes, and 4 seconds. For most general physics applications, this is rounded to 24 hours. This synchronization allows the satellite to remain fixed above a specific point on the Earth's equator, which is essential for consistent satellite communications and meteorological monitoring.

In a circular orbit, the gravitational force acts perpendicular to the direction of the satellite's displacement at every point. Since work is the dot product of force and displacement (W = Fd cos θ) and cos(90°) = 0, the work done is zero.

Because the spoon and the satellite are both in the same state of free fall within the Earth's gravitational field, they share the same orbital velocity. Due to inertia, the spoon will maintain its velocity and continue to follow the same orbital path as the satellite, appearing to float alongside it.

Weightlessness in orbit is not due to the absence of gravity, but rather because the spacecraft and its occupants are in a state of continuous free-fall. Since both are accelerating toward the Earth at the same rate due to gravity, there is no normal force between them, creating the sensation of weightlessness.

Astronauts in an orbiting spacecraft experience a state of weightlessness or microgravity. This occurs because both the spacecraft and the astronauts are in a state of continuous free-fall toward the Earth, meaning there is no normal force acting on them to provide a sensation of weight.

The orbital speed of a satellite close to Earth is approximately 8 km/s. Note that the provided options use units of ms⁻¹, which is physically incorrect for orbital velocity (it should be km/s). We select option B based on the numerical value 8.

A satellite is a celestial body that orbits a planet. The Moon is a natural satellite because it was not man-made and orbits the Earth due to gravitational attraction. Artificial satellites are man-made objects placed into orbit for communication, research, or observation.

According to Newton's First Law of Motion, an object in motion will continue to move in a straight line at a constant velocity unless acted upon by an external force. If gravity disappears, the centripetal force is removed, and the satellite will travel in a straight line tangent to its circular path.

A geostationary satellite orbits the Earth with an orbital period exactly equal to the Earth's rotational period (24 hours). Because it moves in the same direction as the Earth's rotation, it remains fixed above a specific point on the equator. Therefore, its relative velocity with respect to an observer on the ground is zero.

Artificial satellites are human-made objects placed into orbit around a celestial body, such as the Earth, for purposes like communication, weather monitoring, navigation, and scientific research. Unlike natural satellites (like the Moon), which occur naturally in space, artificial satellites are engineered and launched by human agencies to perform specific orbital tasks.