Objects will always be pulled to the center of the mass.
inversely proportional
That's a true statement. Good work!
No, it must not be true.
9.81 m/s2 is the acceleration of an object in free fall, responding only to gravity with no other forces on it, on or near the Earth's surface ... otherwise known as the acceleration of gravity. It's always true on or near the surface of the Earth ... if you can provide those conditions: No other forces except gravity acting on the falling object, including no air resistance !
Yes, gravity exists between two objects that have mass.
always true
always true
No.
true
No.
Yes it is true. There is no way to turn gravity off or shield anything from it, so everything is always being pulled toward everything else by gravity.
inversely proportional
No. Consider the statement "If I'm alive, then I'm not dead." That statement is true. The converse is "If I'm not dead, then I'm alive.", which is also true.
a tautology is a statement that is always true. For example p or not p is always true because one of the two is always true.
Yes
Yes, contrapositives are always true, as long as the original statement stood true.
true