May the FORCE Be With You
A push or pull that acts on an object
What is force?
Define friction.
What is a force that results when surfaces of objects rub against each other and opposes motion?
The motion of an object when it is falling solely under the influence of gravity.
What is free fall?
This is Newton's First Law of Motion, also referred to as the Law of Inertia.
What is: An object in motion (or at rest) will stay in motion (or at rest) until it is acted upon by an outside force?
Believe it or not, physicists believe these are the only four different kinds of force in creation.
What are electromagnetic, strong nuclear, weak nuclear, and gravitational forces?
In the current model of an atom, quarks are held together by this force-carrying particle.
What are gluons?
The SI unit for force
What is the newton, abbreviated as N?
The four main types of friction.
What are static friction, sliding (or kinetic) friction, rolling friction, and fluid friction?
True or false? A feather and a bowling ball will fall at the same rate in the absence of gravity.
True! In the absence of gravity, a heavy object will fall at the same rate as a light object. Watch here:
This is when an object is acted upon by one or more unbalanced forces, the net force is equal to the mass of the object times the resulting acceleration.
What is Newton's Second Law of Motion?
This is the only force that can be attractive or repulsive.
What is the electromagnetic force?
Quantum theorists pose that this small force-carrying particle is responsible for the force of gravity.
What is a graviton?
He's got a scientific measurement, not a fig cookie, named after him.
Who is Sir Isaac Newton, the English physicist who explained the relationship between force, mass, and acceleration?
The frictional force that acts on stationary objects
What is static friction?
The acceleration (i.e. numerical figures) due the gravity near the surface of the Earth.
What is 9.8m/s2 in metric units and 32 ft/s2 in English units?
The formula to go along with Newton's Second Law of Motion
What is:
f=mxxa
This is the reason that protons do not repel each other.
What is the strong nuclear force, which acts over a very short distance, but is the strongest of the fundamental forces?
According to the current model of the atom, protons are made up of these even smaller particles.
What are quarks?
When there is no change in the object's motion, the forces acting on it are _________________.
What is balanced? (when forces on an object combine to produce a net force of zero.)
This is the frictional force that opposes motion once motion has already started.
What is kinetic friction? (but it also known as sliding friction or dynamic friction.
The equation to determine the distance an object falls, using acceleration and time
What is
d = 1/2 x a x t2?
Newton's Third Law
What is: for every action, there is an equal and opposite reaction?
This force plays an important role in nuclear fusion, the reaction that powers the sun and hydrogen bombs.
What is the weak nuclear force?
This theory was developed by Albert Einstein in 1916 and attempts to explain a different way of looking at physics.
What is the General Theory of Relativity?
When an object accelerates, an _____ force is acting upon it.
What is an unbalanced force? (when there is a net forceā 0)
The frictional force that acts on rolling objects
What is rolling friction?
This explains the first part of experiment 7.1 and why the book and the paper fell at different rates.
What is fluid friction or air resistance? (Heavy objects fall faster than light objects because they are not as strongly affected by air resistance as light objects are.)
Definition of Inertia.
What is the tendency of an object to resist changes in its velocity?
Developed by Newton, this law states that every object attracts every other object.
What is Newton's law of universal gravitation?
According to Newton's 1st Law, when a galloping horse suddenly comes to a halt, the cowboy will fall off the horse in this direction.
What is forward?