Earth Gravity | MCQs

Explanation

The weight of an object at the center of the Earth is the same as its weight on the surface.

This might seem counterintuitive, but it's because the gravitational force acting on the object is proportional to the distance from the center of the Earth.

At the center, the distance is zero, but the gravitational force is also zero because the object is surrounded by equal amounts of mass in all directions.

Explanation

As you move toward the center of the Earth, the gravitational force decreases because mass below you exerts less pull.

Therefore, the weight of a body decreases as gravity weakens.

Explanation

The velocity required to put a satellite into orbit around the Earth is approximately 7.8 km/s.