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NEET 2026
Exam
NEET
Year
2026
Subject
Physics
Chapter
Chapter

NEET 2026 · Physics · Chapter

A space probe measures the gravitational force on a 40 g sample of...

A space probe measures the gravitational force on a 40 g40\text{ g} sample of rock to be 0.064 N0.064\text{ N} at the surface of a newly discovered moon. What is the gravitational field strength at the surface of this moon?

Options

  1. A1.6 N kg−11.6\text{ N kg}^{-1}
  2. B0.0016 N kg−10.0016\text{ N kg}^{-1}
  3. C2.56 N kg−12.56\text{ N kg}^{-1}
  4. D0.625 N kg−10.625\text{ N kg}^{-1}

Correct answer

A. 1.6 N kg−11.6\text{ N kg}^{-1}

Step-by-step solution

Given mass of the rock sample, m=40 g=0.04 kgm = 40\text{ g} = 0.04\text{ kg}

Gravitational force on the sample, F=0.064 NF = 0.064\text{ N}

The gravitational field strength gg is given by the force per unit mass:

g=Fmg = \dfrac{F}{m}

g=0.0640.04g = \dfrac{0.064}{0.04}

g=1.6 N kg−1g = 1.6\text{ N kg}^{-1}

Answer: 1.6 N kg−11.6\text{ N kg}^{-1}
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