Q. If radius of Earth becomes half, g at surface becomes

यदि पृथ्वी की त्रिज्या आधी हो जाए तो सतह पर g हो जाता है

g/2
जी/2

2g
2 ग्रा

g/4
जी/4

4g
4 जी

Acceleration due to gravity is:

g = \frac{GM}{R^2}

If the radius $R$ becomes half ( $R/2$ ), then:

g' = \frac{GM}{(R/2)^2} = \frac{GM}{R^2/4} = 4 \times \frac{GM}{R^2} = 4g

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