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Two spheres with masses 5 g and 10g are .500 m apart. What is the gravitational force between them?

Sagot :

AL2006
The force of gravity between two objects is

                   Force = G M₁ M₂ / D²

G = the SI gravitational constant= 6.67 x 10⁻¹¹ newton-meter² / kilogram²
M₁ and M₂ = the masses of the objects
D = the distance between their centers

In order for this simple formula to work, the masses need to be in kilograms,
and the distance needs to be in meters.

M₁ = 5g = 0.005 kilogram
M₂ = 10g = 0.01 kilogram
D = 0.5 meter . . . . . D² = 0.25 m²

Force = (6.67 x 10⁻¹¹) (0.005) (0.01) / (0.25) = 1.334 x 10⁻¹⁴ newton

In standard form, that's 0.00000000000001334 newton .

That force feels like about 0.000000000000048 ounce .
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