Pregled posta

THE HOUSE OF THE LAWS OF MOTION

SING THESE WORDS TO THE TUNE OF
THE HOUSE OF THE RISING SUN.

THERE IS A LAW OF MOTION
THEY CALL IT NEWTON ONE
WITHOUT A FORCE TO CHANGE IT
AMASS WILL ONWARD RUN.

THERE IS NO DIMINUTION
OR INCREASE IN ITS SPEED
ITS STRAIGHT PATH LIES BEFORE IT
AFUTURE FIXED INDEED.

AND IF A SPEED BE LACKING
THAT MASS WILL NOT BE MOVED
ITS PLACE WILL BE A CONSTANT ONE
AS MANY YEARS HAVE PROVED.

BUT IF EXTERNAL FORCES
DO FAIL TO ADD TO NAUGHT
THE CHANGES TO MOMENTUM
NO LONGER CANCEL OUT.

THE NET ACCELERATION IS
PROPORTIONAL TO FORCE
AND INVERSE AS INERTIA
WHICH SOME CALL ‘MASS’, OF COURSE.

NOW TALKING OF MOMENTUM,
TWO MASSES CAN COLLIDE
IF SO THE FORCE FROM ONE OF THEM
THE OTHER MUST ABIDE.

AND WHEN THAT OTHER BODY
FEELS ACTION FROM ITS MATE
THE FORCE OF ITS REACTION
ACTS BACK AT EQUAL RATE.

AND SO THE NET MOMENTUM
WHEN ADDED UP AT LAST
GIVES ZERO CHANGE IN TOTAL FROM
ITS VALUE IN THE PAST.

THERE ARE THREE LAWS OF MOTION
THAT ALL GOOD THINGS OBEY,
I TRUST THOSE LAWS THAT NEWTON FOUND
WILL NEVER GO AWAY.