I have to guess either gravity or friction.
If by that you mean a force that opposes the start of motion, then your force would be static friction.
Static friction only occurs before an object starts moving, as opposed to kinetic friction which occurs when the objects is moving or sliding. The equation for static friction is: Ff = (coefficient of static friction) * FN
Inertia
To begin to move an object, the force we will first have to overcome is the static friction of the object. It is fairly well known that if we're going to, say, slide a box across a floor, it takes more force to start it moving, and less to keep it moving. That's the difference between the static friction and the dynamic friction. It takes more force to "break loose" the object and start it moving (overcome static friction) than it does to actually keep it moving (overcome dynamic friction). A link can be found below.
-- If a motionless object begins to move, then its speed changes (from zero to something).
-- If its speed changes, then there is acceleration.
-- Force is necessary to produce acceleration.
The force is usually it's owns force e.g the plane uses it's own force so it can fly straight, it can also be gravity if it is moving down
Friction, or inertia. They can be considered the same thing depending on what you're trying to do.
Static- APEX
JT
"The force of STATIC friction" (APEX)
Yes
Gravity
Inertia
To make an object start moving is called acceleration, and it is done by exerting force on that object.
Friction. Specifically, static friction. After the object begins to move, it will still be necessary to overcome rolling or sliding friction to keep it in motion.
"What is the force exerted by a still liquid on an immersed non-moving object called? -- PressureOtherwise, if the object is moving, one could also have "shear forces".
centripetal
Inertia
Sticky friction.
Unbalanced force is a type of force that causes an object to start moving.
If an object is at rest it has inertia, which has to be overcome to make it move. When an object is moving in a straight line at a constant speed it has momentum, which must be overcome to slow or stop the object
Frictional force resists movement. In order to set an object into motion (or accelerate an already moving object), the force of friction must be overcome.
To make an object start moving is called acceleration, and it is done by exerting force on that object.
Friction. Specifically, static friction. After the object begins to move, it will still be necessary to overcome rolling or sliding friction to keep it in motion.
Any force will change the rate and/or the direction or an object, whether or not it is (initially) in motion.The only exceptions would be if there is something (like a surface supporting it) keeping the object from moving in the direction of the force, or if the object is initially not moving, and the force in not enough to overcome friction.
drag
"What is the force exerted by a still liquid on an immersed non-moving object called? -- PressureOtherwise, if the object is moving, one could also have "shear forces".
You have three separate situations here:1. Object stays at rest. The force on the object is not great enough to overcome its frictional forces, or its inertia.2. Object keeps moving at constant velocity. The object's inertia and frictional forces are exactly balancedby the Force exerted on it.3. Object moves with increasing velocity (acceleration). The Force on the object exceeds that necessary to overcome its inertia and its frictional forces.
centripetal