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Question

# What is the numerical value of gravitational constant?

A

10 ms2

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B

6.67×1011 Nm2kg2

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C

9.8 ms2

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D

6.67×1011Nm2Kg3

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Solution

## The correct option is B 6.67×10−11 Nm2kg−2 The value of universal constant 'G' is an experimental value given by Henry Cavendish. It is a very low number, equal to 6.67×10−11 Nm2kg−2. If two masses of 1 kg are separated at a distance of 1 m. Then the gravitational force acting between them will be very small i.e., 6.67×10−11 N (GMmr2). Acceleration of 1 kg mass due to the force is 6.67×10−11 ms−2. The small acceleration has a negligible effect on the motion of the 1 kg mass.

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