NEET Solved Paper 2019 Question 28
Question: The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is: [NEET 5-5-2019]
Options:
A) $ \frac{1}{2}mgR $
B) $ \frac{3}{2}mgR $
C) $ mgR $
D) $ 2mgR $
Show Answer
Answer:
Correct Answer: A
Solution:
$ \Delta PE=\frac{GMm}{r _1}-\frac{GMm}{r _2} $
$ \frac{GMm}{R}-\frac{GMm}{2R} $
$ \frac{GMm}{2R}-\frac{mgR}{2} $
BETA
