Gravity is the prime driving force behind the natural motions. Gravity causes the rain to fall, and the rivers to run to the sea. When the sun heats the air or evaporates the moisture, it is the change in density upon which gravity acts to allow the more dense air to flow down and the warmer air consequently to rise.
Gravity also drives some major sea currents, such as the hyper-saline currents that start in the polar regions, and drive major oceanic circulation.
The Sun provides heat energy to evaporate the water, and this in conjunction with gravity causes the winds to arise.
If there is no net force, the object will stay at rest if it was at rest, or continue moving - at constant velocity - if it was already moving.
A friction is a force that acts in the opposite direction of a moving body. It acts at the meeting of two different surfaces. So friction always resists motion.
You can predict its motion until some force acts on it.
an object will keep moving in a particular direction unless another force acts on the object
fiRSt LAW Of MOtiON
If there is no net force, the object will stay at rest if it was at rest, or continue moving - at constant velocity - if it was already moving.
A friction is a force that acts in the opposite direction of a moving body. It acts at the meeting of two different surfaces. So friction always resists motion.
an object will keep moving in a particular direction unless another force acts on the object
You can predict its motion until some force acts on it.
an object will keep moving in a particular direction unless another force acts on the object
Nothing changes. When no force acts on an object moving with constant velocity, the body continues its motion with uniform velocity, or if the object is at rest, it will remain at rest.
Anything that's moving keeps moving in a straight line at constant speed, unless a force acts on it.Anything that's not moving can't start moving, unless a force acts on it.Any change of speed or direction needs a force to make it happen.
Unbalanced force
It's Newton's first law of motion: "An oject in motion will stay in motion (with the same velocity) until an outside force acts upon it and an object at rest will stay at rest until an outside force acts upon it."
What do you mean? Do you mean 'law' or 'long'? If you meant law, then the first law of motion says that something not moving will remain not moving unless an unbalanced force acts upon it.
fiRSt LAW Of MOtiON
Answer It is the force which keeps a body moving in circular motion. Centripetal force is the force that acts opposite to cetrifugal force. Centripetal force is a real force. Centrifugal force is a pseudo-force