A body weighs 48 N on the surface of the earth. The gravitational force experienced by the body due to the earth at a height equal to one-third the radius of the earth from its surface is :

1. 16 N

2. 27 N

3. 32 N

4. 36 N

Doubtly Asked 30 Oct 2026 NEET UG 2025 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 2. 27 N

Key idea: weight at height $h$ varies as $\dfrac{1}{(R+h)^2}$.

$$F=48\left(\frac{R}{R+R/3}\right)^2=48\times\left(\frac34\right)^2=48\times\frac9{16}=27\ \mathrm N$$

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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