MCQ practice · SSC Physics Board questions · Chapter 3: Force
What is the numerical value of the gravitational constant?
Think it through first, then pick an option.
- a 5.98 × 10²⁴
- b 6.37 × 10⁶
- c 6.67 × 10⁻¹¹
- d 1.6 × 10⁻²⁴
Answer and explanation
Correct answer: c 6.67 × 10⁻¹¹
The gravitational constant G is 6.67 × 10⁻¹¹ Nm²kg⁻².
Why the other options are wrong
- a 5.98 × 10²⁴: 5.98 × 10²⁴ kg is the mass of the earth, not the gravitational constant.
- b 6.37 × 10⁶: 6.37 × 10⁶ m is the radius of the earth, not the gravitational constant.
- d 1.6 × 10⁻²⁴: 1.6 × 10⁻²⁴ is not a value in this chapter; G is 6.67 × 10⁻¹¹.
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