Gravitation — Prelims Questions

Which of the following statements about gravitational acceleration (g) on Earth is/are correct? 1. The value of 'g' is maximum at the equator and minimum at the poles. 2. The value of 'g' decreases with increasing altitude from the Earth's surface. 3. The value of 'g' decreases as one goes deeper into the Earth. Select the correct answer using the code given below:

Consider the following statements regarding geostationary satellites: 1. They orbit at an altitude of approximately 35,786 km above the Earth's surface. 2. Their orbital period is exactly 24 hours. 3. They are primarily used for remote sensing and weather forecasting. Which of the statements given above is/are correct?

Kepler's Second Law of Planetary Motion, the Law of Areas, implies that:

Which of the following phenomena is/are explained by Einstein's General Theory of Relativity but not by Newton's Law of Universal Gravitation? 1. Precession of Mercury's orbit. 2. Bending of light by massive objects. 3. Existence of tidal forces. Select the correct answer using the code given below:

What is the primary reason for 'weightlessness' experienced by astronauts in the International Space Station (ISS)?