Concrete is also used as beam material, and is cheaper. However, concrete is comparatively not that strong to withstand the high tensile forces acting on the beams
'Newton' is [ kg·m/s² ].
So if you divide Newtons by [ m/s ], it goes something like this:
(kg·m/s²) / (m/s) =
(kg·m/s²) · (s/m) =
(kg·m·s / m·s²) =
kilogram / second .
This is an interesting exercise in manipulating units, but it doesn't seem to mean anything in the real world.
We performed one meaningless operation ... dividing force by speed ... and ended up with another quantity that has no physical significance ... kilogram per second.
Answer: attractive
Explanation:
According to Newton's law of Gravitation, the gravitational force 
exerted between two bodies of masses 
and 
and separated by a distance 
is equal to the product of their masses and inversely proportional to the square of the distance:
Where:
is the Gravitational Constant
and are the masses of the objects
is the distance between the objects
It should be noted: this force is a central force and is attractive.
