Detailed Explanation:

Earth's rotation creates a centrifugal effect that opposes gravity, reducing the effective weight of objects, especially at the equator where the rotational radius is maximum.

• Apparent gravity formula: g' = g - ω²R, where ω is angular speed and R is Earth's radius at the equator.
• Increased spinning speed: Higher ω increases ω²R, thereby decreasing g' (apparent gravity).
• Weight reduction: Since weight = mg', a smaller g' directly reduces the body's weight at the equator.
• Therefore, faster Earth rotation decreases equatorial weight, making Option 1 the correct answer.