Newtons first law

Conceptual physics chapter 4

Newton's First Law

A body at rest stays at rest and a body in motion stays in motion unless acted upon by an outside force.

Force

push or a pull

When throwing a ball your hand is the

force

A force is ____ in different ways

exerted

A paper clip is moved by a

magnet

More than one force can act on an ____ at the same time

object

The combination of all forces acting on an object is

Net force

When more than one force acts on an object net force determines

motion

If an object is not moving, the net force is

zero

Balanced

cancel each other out no change in its motion

Unbalanced

do not cancel each other out the object goes into motion

Galileo was an

Italian scientist that lived from 1564-1642

The First to understand that a force does not need to be constantly applied to keep an object moving was

Galileo

Galileo's ideas helped

Sir Issac Newton

A force that brings nearly everything to a stop is

Friction

Newtons 1st law describes

motion & net force

Because Newton studied Galileo's ideas he was able to formulate his

laws of motion

Three types of friction

static, sliding, rolling

Static Friction

Prevents an object from moving when a force is applied

Static Friction is caused by the attraction between the atoms of two _____ that are in contact

surfaces

Sliding Friction

Slows a sliding object down

Rolling Friction

friction that occurs when an object rolls over a surface