Question

If
the
radius
and
the
mass
of
Earth
are
halved ,
find
the
value
of
‘g‘on


the
surface
earth.​

Answer 1

Answer:

If both the radius and mass of the Earth becomes half, then what will be the value of G?

Be careful here: G is used for the universal gravitational constant, whereas g is used for the local acceleration due to gravity (such as on Earth’s surface).

You apparently mean the latter, though, so remember Newton’s force equation:

F=Gm1m2r2.

Remember Newton’s second law also: F = ma. Dividing by m, we have a = F/m. Let the ‘m’ here be m₂ in the first force equation. Then letting a = g, we get

g=Gm1r2.

This is the equation for the gravitational acceleration at some distance r from the center of a body (such as Earth).

If both the radius and mass are reduced to 1/2, you get

g2=Gm12(r2)2, which reduces to twice the value for g₁: g₂ = 2g₁.

Answer 2

Answer:Use the Knox Quanlity of Conservation to find Delta Phy

Explanation: