The mass of the Earth is ________.
6 × 10 24 kg
Correct Answer: Option 4 – 6 × 10²⁴ kg
Earth's Mass:
• The actual mass of the Earth is approximately 5.972 × 10²⁴ kg.
• In school-level questions, it is usually rounded to 6 × 10²⁴ kg.
How Scientists Calculate Earth's Mass:
Scientists use Newton's Law of Universal Gravitation:
g = GM/R²
Where:
• g = Acceleration due to gravity (≈ 9.8 m/s²)
• G = Universal gravitational constant
• M = Mass of the Earth
• R = Radius of the Earth
Using known values of g, G, and R, the Earth's mass can be calculated.
Therefore, the mass of the Earth is approximately 6 × 10²⁴ kg.
Important Questions from Gravity
Who among the following was the first to conclude that in vacuum all objects fall with the same acceleration g and reach the ground at the same time?
Who among the following is credited with postulating three laws of planetary motion?
When did Henry Cavendish report the measurement of the gravitational constant with the mass and density of the Earth?
Which of the following law states that, "The force between two objects is directly proportional to the product of their masses?"
Which of the following statements about the movement of planets is true?
A. A planet's orbit is elliptical with the Sun at one of two focal points.
B. The orbit of a planet is circular with the sun in the center.
C. The orbit of a planet is elliptical with another planet in one of the two center-points.
D. The orbit of a planet is circular with another planet in the center.
