Question

A mass of 10 kg is balanced on a sensitive physical balance.A 1000 kg mass is placed below 10 kg mass at a distance of 1m.how much additional mass will be required for balancing the physical balance

Answer 1

Answer:

Using the Newton’s law of gravitation

F=GMmr2

F is the force between the two bodies

G is the gravitational constant

M is mass for first body

m is mass of second body

r is distance between two bodies

F=6.6×10−11×10×10001

F=6.6×10−7N

We know that,

F=mg

g is acceleration due to gravity

Therefore,

mg=6.6×10−7N

m=6.7×10−8kg

The additional mass will be required for balancing the physical balance is 6.7×10−8kg.

Explanation:

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