Aug 25, 2015 · 1 pound mass is that mass that weighs one pound in 1 g gravity. For most practical cases, a pound mass and a pound weight define the same amount of stuff on the surface of the earth. To define a pound mass we rearrange Newton's law of F = mA to. m = F/A. then plug in the particulars to get pound mass: 1 pound mass = (1 pound force)/(32.174 ft/s²)

Feb 16, 2021 · By example, an object with a mass of 5 lb $_m$ has a mass of 2.2680 kg regardless of where it sits (e.g. what planet). But this mass. exerts 5 lb $_f$ as its weight on earth; exerts 0.827 lb $_f$ as its weight on the moon with gravitation 5.32 ft/s $^2$ By inversion, an object that exerts 5 lb $_f$ as its weight on the moon has a mass of 30.2 ...

Apr 19, 2022 · In the Imperial system the mass unit is the slug [sl], and is derived from the pound-force by defining it as the mass that will accelerate at $1 ft/s^2$ when a $1 lb_f$ acts upon it. The density of water is $1.940 sl/ft^3$ at 39 °F (4 °C), and the specific weight in Imperial units is:

Aug 22, 2016 · I think this is very fundamental question. I am wondering why 0.00259 is used as weight-mass conversion ratio, when inch/pound unit is used in Nastran.

Jun 13, 2023 · Pound-force (lbf) vs Pound-mass (lbm) 3. Design a beam that is straightened with force on one end. 4 ...

May 14, 2015 · 5 cm = 0.05 m. The gravitational force on your 450 g mass is 4.4 N as you say, so the torque just to keep up with gravity is (4.4 N)(0.05 m) = 0.22 Nm. However, that is the absolute minimum torque just to keep the system in steady state. It leaves nothing for actually accellerating the mass and for overcoming the inevitable friction.

A pound force is defined as the force required to accelerate a slug at 1 ft/s^2. The density of air is $\rho = 0.0724 \ lb_m/ft^3 = 0.0724/32.2 \ slugs/ft^3$ The weight of the air is $\rho V g = 0.0724/32.2 \ slugs/ft^3 \cdot32.2 ft/s^2\cdot 6000 ft^3 = 0.0724\cdot 6000 \ …

Feb 19, 2020 · Two people each exerting 50 pounds can lift a 100 pound object; two levers double the force applied; two locomotives double the pulling power, etc. Share Improve this answer

Mar 29, 2022 · $\begingroup$ using horsepower, the units will be HP/pound or hp/ton most likely. Hp has a conversion factor in it, 33000 ft-lb/min/HP. $\endgroup$ – Tiger Guy

Aug 10, 2020 · $\begingroup$ @gfdsal If I recall, Stephen Vogel's book Comparative Biomechanics says that pound for pound, motor and muscle are pretty similar in terms of power density. So motor and muscle that are capable of the same power output will weigh the same, except that the muscle will be larger and the motor will be smaller due to difference in ...