Flashcards in C5 Terms Deck (72)
A push or pull on a system. Can either be scalar or vector.
The SI unit of force.
Strong nuclear force
The force that holds protons and neutrons together in nuclei.
The attractive or repulsive force produced by static and moving charges in atoms.
weak nuclear force
A force exerted between elementary particles of matter within the nucleons
gravitational force (Fg)
The force exerted by all matter on other matter.
The force that acts between systems when one system touches another.
List four mechanical (contact) forces
Compression - drill pressTension - dog on leash pullingTorsion - twisting lid off bottleShear - shear pins
How is dynamics different from kinematics?
Dynamics is the sudy of how forces affect an objects motion, and kinematics is the science of discribing how things move.
What kind of physical quantity is a force?
A vector quantity.
What is the SI unit of force?
What symbol for force is used in diagrams?
What 2 symbols are used for force in formulas?
F or an f with an arrow on top.
Compare contact and field forces
Contact forces are exerted by objects that are in contact with each other. Field forces act across distances without physical contact.
Which fundamental force is responsible for holding the universe’s matter in recognizable structures such as planets?
If forces acting on a system produce a net force, what can we say about those forces?
They are unbalanced forces.
What is the mathematical relationship between weight and mass of an object?
What restriction exists in using 9.81 N/kg as the proportionality constant for determining weight?
It has to be near the Earths surface.
(T/F) Compressive and tensional forces act in opposite directions on a system?
The mathematical description of a field force exerted in the space surrounding an object that is the source of or is susceptible to the field force.
A non contact force exerted on a susceptible object by similar objects.
Do all field forces visibly affect all matter?
No, some materials are susceptible to certain field forces, and others are not. (Electric and magnetic forces for example) All materials are affected by a gravitational field.
A force that in combination with other forces acting on the same system produces a zero net force on the system.
A force exerted on a system by something in its surroundings.
The single unbalanced force acting on a system that is the sum of all forces acting on the system.
A force that in combination with other forces acting on the same system results in a nonzero net force and produces a change in motion of the system.
The tendency of all matter to resist change in motion.
What is the physical property of inertia?
Laws of motion
Written by Newton and define the science of dynamics and apply to all areas of mechanics.