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No force is required to keep something moving. According to Newton's Second Law, you need a force to speed something up, or to slow something down - not to keep it moving.
In a broad spectrum of forces, most scientists narrow the force down into three categories, Gravitational Force, Strong Nuclear Force, and Weak Nuclear or Electromagnetic Force.
Because of the upward force pushing it up. It is too strong to let gravity pull it down.
Gravitational force makes it possible to walk, run, drive, and lie down. It also makes rain, snow, and wind possible.
Physical Pressure, as in press down or against something, is contact.
Repression
Yes.
Friction is a force that opposes all movement to slow down a moving object.
The weight of the objects or due to the force
Gravity
No force is required to keep something moving. According to Newton's Second Law, you need a force to speed something up, or to slow something down - not to keep it moving.
No, you will break something and cost you more $$$.
It is a force which acts in the upward direction.
Gravity. It's the same force which pulls things down even without water.
A force is needed to start something moving and to stop it once it is moving. A force can make something speed up or slow down. Friction is a force generated when surfaces move across each other.
Depends: If it is coming down, air resistance If it is going across something, friction
In a broad spectrum of forces, most scientists narrow the force down into three categories, Gravitational Force, Strong Nuclear Force, and Weak Nuclear or Electromagnetic Force.