identify all the forces acting on an object at rest
Answers
Explanation:
An object is at rest does not mean that no force is acting on it. ... These are it's weight (gravity) and equal and opposite force from the ground (normal reaction). Since these forces are equal and opposite to each other, the vector sum of these equals zero and thus, the ball is in static equilibrium i.e. rest
Answer:
We know that gravity acts downward as the object's weight, and we also know that since the object is resting on a surface, the normal force opposes the gravitational force, right? So in this case, we can see that the individual forces acting on this object are gravity and the normal force.
Explanation:
Forces that act on all objects.
Weight (W, Fg)
The force of gravity acting on an object due to its mass. An object's weight is directed down, toward the center of the gravitating body; like the Earth or moon, for example.
Forces associated with solids.
Normal (N, Fn)
The force between two solids in contact that prevents them from occupying the same space. The normal force is directed perpendicular to the surface. A "normal" in mathematics is a line perpendicular to a planar curve or surface; thus the name "normal force".
Friction (f, Ff)
The force between solids in contact that resists their sliding across one another. Friction is directed opposite the direction of relative motion or the intended direction of motion of either of the surfaces.
Tension (T, Ft)
The force exerted by an object being pulled upon from opposite ends like a string, rope, cable, chain, etc. Tension is directed along the axis of the object. (Although normally associated with solids, liquids and gases can also be said exert tension in some circumstances.)
Elasticity (Fe, Fs)
The force exerted by an object under deformation (typically tension or compression) that will return to its original shape when released like a spring or rubber band. Elasticity, like tension, is directed along an axis (although there are exceptions to this rule).
Forces associated with fluids. Fluids include liquids (like water) and gases (like air).
Buoyancy (B, Fb)
The force exerted on an object immersed in a fluid. Buoyancy is usually directed up (although there are exceptions to this rule).
Drag (R, D, Fd)
The force that resists the motion of an object through a fluid. Drag is directed opposite the direction of motion of the object relative to the fluid.
Lift (L, Fℓ)
The force that a moving fluid exerts as it flows around an object; typically a wing or wing-like structure, but also golf balls and baseballs. Lift is generally directed perpendicular to the direction of fluid flow (although there are exceptions to this rule).
Thrust (T, Ft)
The force that a fluid exerts when expelled by a propeller, turbine, rocket, squid, clam, etc. Thrust is directed opposite the direction the fluid is expelled.
Forces associated with physical phenomena.
Electrostatic Force (FE)
The attraction or repulsion between charged bodies. Experienced in everyday life through static cling and in school as the explanation behind much of elementary chemistry.
Magnetic Force (FB)
The attraction or repulsion between charged bodies in motion. Experienced in everyday life through magnets and in school as the explanation behind why a compass needle points north.
Fundamental forces. All the forces in the universe can be explained in terms of the following four fundamental interactions.
Gravity
The interaction between objects due to their mass. Weight is a synonym for the force of gravity.
Electromagnetism
The interaction between objects due to their charge. All the forces discussed above are electromagnetic in origin except weight.
Strong Nuclear Interaction
The interaction between subatomic particles with "color" (an abstract quantity that has nothing to do with human vision). This is the force that holds protons and neutrons together in the nucleus and holds quarks together in the protons and neutrons. It cannot be felt outside of the nucleus.
Weak Nuclear Interaction
The interaction between subatomic particles with "flavor" (an abstract quantity that has nothing to do with human taste). This force, which is many times weaker than the strong nuclear interaction, is involved in certain forms of radioactive decay.
Fictitious forces. These are apparent forces that objects experience in an accelerating coordinate system like an accelerating car, airplane, spaceship, elevator, or amusement park ride. Fictitious forces do not arise from an external object like genuine forces do, but rather as a consequence of trying to keep up with an accelerating environment.
Centrifugal Force
The force experienced by all objects in a rotating coordinate system that seems to pull them away from the center of rotation.
Coriolis Force
The force experienced by moving objects in a rotating coordinate system that seems to deflect them at right angles to their direction of motion.
"G Force"
Not really a force (or even a fictitious force) but rather an apparent gravity-like sensation experienced by objects in an accelerating coordinate system.
Generic forces. When you don't know what to call a force, you can always give it a generic name like…
Push
Pull
Force
Applied Force
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