"1st LAW OF MOTION"
Inertia: Tendency of an object resist change in motion due to mass.
"Kite in stable flight. Zero vertical velocity lift balances weight and vertical pull.
"If thrust and drag are equal, aircraft holds constant airspeed."
"The heavy weight champion can hit the massive bag with considerable force."
The acceleration, a, which may be supposed uniform, is 1.465.
Per hour the horse-power required is reduced to about one-third of that required foracceleration alone.
They were seen stringing up motion sensors earlier.
He kicked the mule into motion and started out across the sand.