No. Gravity is able to operate just fine between the Earth and the Sun,
without contact, and with 93 million miles of nothing in between.
it is contact force
yes
Non-Contact ForcesWhile the ball is in the air, one force acting on it is gravity. Gravity pulls the ball down to the earth without touching it. This means it is an example of a non-contact force, or a force exerted on an object that does not make contact with it. Another example of a non-contact force is magnetism. Read more about magnetism.
No, upthrust would not be considered a non-contact force. It would be considered a contact force. It is making contact with an updraft of air.
Not necessarily, for instance gravity.
-gravity
Yes.
Gravity is action at a distance, a non contact force
Non-Contact ForcesWhile the ball is in the air, one force acting on it is gravity. Gravity pulls the ball down to the earth without touching it. This means it is an example of a non-contact force, or a force exerted on an object that does not make contact with it. Another example of a non-contact force is magnetism. Read more about magnetism.
No, upthrust would not be considered a non-contact force. It would be considered a contact force. It is making contact with an updraft of air.
contact
Gravity requires no direct contact, if that's what you mean.
The buoyant force is a contact force, exerted by contact with a liquid that displaces the liquid within a gravity field. No contact, no force.
Gravity.
Not necessarily, for instance gravity.
No, upthrust would not be considered a non-contact force. It would be considered a contact force. It is making contact with an updraft of air.
No - gravity acts across the vacuum of space - this is how the moon affects our tides.
-gravity
Yes.