Question

An object is taken to a height above the surface of earth at a distance $\frac{5}{4} R$ from the centre of the earth Where radius of earth, $R =6400 km$ The percentage decrease in the weight of the object will be

• A. $36 \%$
• B. $50 \%$
• C. $64 \%$
• D. $25 \%$

Answer 1

Answer: (A)

$36 \%$

Answer 2

geff ​=(1+Rh​)2g​;geff ​=(1+41​)2g​=2516g​
change =ggeff ​−g​×100=12516​−1​×100
=25−9​×100=−36%