# 5B Newton's Laws of Motion

## 15 terms · Pg. 109-115

### Inertia

the tendency of all matter to resist change in motion ; mass is a measure of this ; quantified by mass ; cannot be measured directly

### Galileo

1st person to investigate these ideas of inertia

### Law of Motion

Newton's three laws of motion, define the science of dynamics; apply to all areas of mechanics; law of inertia, the law of accelerated motion, and the law of action-relation

### Isaac Newton

extended Galileo's studies to create the field of physical Dynamics by formulating the law of motion

### Galileo's day

lack of clocks, hindered study of dynamics

### Law of Inertia

objects at rest remain at rest; and objects in motion continue in a straight line at constant velocity unless acted by a net external force

### Isaac Newton

published all his laws in Latin, in his famous book, Principia

### Motte translated the first law as follows:

"Everybody continues in its state of rest, or of uniform
motion in a right line, unless it is compelled to change
that state by forces impressed upon it."

### Mechanical Equilibrium

the condition in which all forces acting on a system are
balanced as indicated by the system's lack of acceleration; no change to the system's motion

### Law of Accelerated Motion

acceleration of a system is directly proportional to the net force acting on the system and is inversely proportional to its mass

### Principia by Isaac Newton, The Second Law can be stated as follows:

"The charge of motion is proportional to the motive force impressed; and is made in the direction of the right line in which the force is impressed."

a=f/m
F=ma

### a

system's acceleration in meters per second per second

### F

magnitude of the net force acting on the system in newtons

### m

magnitude of the net force acting on the system in newtons