Column I
an influence that causes the motion of an object with mass to change its velocity
What is Force?
the SI unit of force
What is Newton?
the vector sum of forces acting on a particle or object
What is Net Force?
the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other
What is Friction?
the force of friction on an object that is not moving
What is Static Friction?
the resistance created by any two objects when sliding against each other
What is Sliding Friction?
the frictional force that occurs when one object rolls on another
What is Rolling Friction?
the friction between layers of a viscous fluid that are moving relative to each other
What is Fluid Friction?
the force that acts in the opposite direction to an object moving through the air
What is Air Resistance?
the force that attracts a body toward the center of the earth, or toward any other physical body having mass
What is Gravity?
the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration
What is Terminal Velocity?
a form of motion experienced by an object or particle that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path under the action of gravity only
What is Projectile Motion?
the tendency that an object will continue its current motion until some force causes its speed or direction to change
What is Inertia?
A measure of the amount of matter contained in or constituting a physical body
What is Mass?
the force acting on the object due to acceleration or gravity
What is Weight?
strength or force gained by motion or by a series of events
What is Momentum?
the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces
What is Law of Conservation of Momentum?
a force that acts between charged particles and is a combination of electrical and magnetic forces
What is Electromagnetic Force?
the force that holds protons and neutrons together
What is Strong Nuclear Force?
a fundamental force of nature that underlies some forms of radioactivity, governs the decay of unstable subatomic particles such as mesons, and initiates the nuclear fusion reaction that fuels the Sun
What is Weak Nuclear Force?
the force of attraction between all masses in the universe
What is Gravitational Force?
What is Centripetal Force?