Chapters 1 & 2
About Science/Mechanical Equilibrium
About Science/Mechanical Equilibrium
This is a quantity that needs both magnitude and and direction for a complete description.
What is a vector quantity?
The Greek scientist Aristotle divided motion into this, and this:
What are natural motion and violent motion?
This equals the rate at which velocity changes.
Change in velocity/Time interval = ?
What is acceleration?
this is a quantity described only by magnitude.
What is a scalar quantity?
This law of motion states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
What is Newton's 3rd law of motion?
This is an educated guess not fully accepted until demonstrated by experiment.
What is a hypothesis?
This equals the quantity of matter in an object, while this equals the force of gravity on an object.
What is mass? What is weight?
This represents how fast an object is moving, and can be calculated by dividing the distance covered by the time interval.
Distance/Time = ?
What is speed?
This is the amount of force acting on an object per unit of area.
What is pressure?
This is always part of a mutual action that involves another force.
What is a force?
This is a method of answering theoretical questions, while This is a method of solving practical problems.
What is science? What is technology?
Newton's first law of motion states that objects in motion tend to stay in motion, while objects at rest tend to stay at rest. The law is usually known as this:
What is the law of inertia?
This equals a speed in a given direction.
What is velocity?
The force of this on an object can be calculated by multiplying the object's speed by its frontal surface area.
What is air resistance?
This is the mass of an object multiplied by its velocity.
What is momentum?
This is the sum of two or more vectors.
What is a resutlant?
When this is present acting on an object, a force is needed to keep the object moving.
What is friction?
An object moving under the influence of gravity only is said to be in this state of motion.
What is free fall?
When the air resistance on a falling object equals the weight of the object, the object will cease to accelerate because it has reached this:
What is terminal speed (or terminal velocity)?
This is said to take place when objects collide without being permanently deformed or generating heat.
What is an elastic collision?
The Italian physicist Galileo Galilei and the English philosopher Francis Bacon are credited as the founders of this process.
What is the scientific method?
The ability of objects to resist changes in their state of motion is called this:
What is inertia?
This equals the acceleration due to gravity.
What is 9.8 meters/second?
This acting on an object will cause it to accelerate.
What is an unbalanced force(s)?
The quantity force multiplied by time interval is known as this.
Force x Time interval = ?
What is impluse?