The foot-pound force (symbol: ft⋅lbf, ft⋅lbf, or ft⋅lb) is a unit of work or energy in the engineering and gravitational systems in United States customary and imperial units of measure. It is the energy transferred upon applying a force of one pound-force (lbf) through a linear displacement of one foot.
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How much force is a foot-pound?
As a unit of energy, one foot-pound is the energy it takes to push with one pound-force one pound for a distance of one foot. 1 foot-pound is equivalent to: 1.3558179483314004 joules (exactly) 13558179.483314004 ergs (exactly)
Is foot-pounds a unit of pressure?
Pounds or Pounds Force per Square Foot is a British (Imperial) and American pressure unit which is directly related to the psi pressure unit by a factor of 144 (1 sq ft = 12 in x 12 in = 144 sq in). 1 pound per square foot equals 47.8803 pascals.
What does ft pounds of torque mean?
So, first thing first: torque is a measure of force. It’s measured in pound-feet (lb-ft). So, one pound acting on a lever one foot away from an axle will be one lb-ft of torque.
Is torque lb/ft or ft lb?
The “pound-foot” (lb-ft) is a unit of torque and a vector measurement that is created by one pound of force acting on a one foot lever. The formula for torque in the instance of tightening a fastener would be: Torque equals force times radius, or T = FR.
What is the difference between pound-feet and foot-pounds?
Pound-foot is a unit of torque and a vector measurement created by one pound of force acting on a one-foot lever, EngineLabs explains. You’ll see the plural form of the term, “pound-feet,” abbreviated in car performance specs, such as 250 lb-ft of torque. However, foot-pound is “a measurement of work,” EngineLabs adds.
Does 12 inch pounds equal 1 foot-pound?
One foot-pound is equal to 12 inch-pounds. To convert your foot-pound measurement to inch-pounds, multiply your figure by 12.
What does foot-pounds mean in bullets?
To begin with, the definition of “foot-pounds” is: “a unit of energy, equal to the amount of energy required to raise a weight of one pound a distance of one foot.” (Webster’s) Anyone who has ever played around with firearms for very long has discovered that a gun with “2000 ft.
How do you convert foot-pounds to PSI?
Write the number of pounds per square foot to be converted. Divide the number of pounds per square foot by 144. The quotient is the pounds per square inch. For example, 2,160 pounds per square foot converts to 15 pounds per square inch (2160 psf ÷ 144 = 15 psi).
How do you calculate foot-pounds of torque?
We measure torque by multiplying two factors—amount of force applied and distance from the point of application. For this reason, the torque amount is written in units of force and distance, like 15 lbf. ft torque measurements in ounces and inches will be smaller than those in feet and pounds or yards and tons.
What is the unit of pressure in physics?
In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals.
Is pound a unit of force?
The pound of force or pound-force (symbol: lbf, sometimes lbf,) is a unit of force used in some systems of measurement, including English Engineering units and the foot–pound–second system.
Where does the 5252 constant come from?
The number 5,252 is the result of lumping several different conversion factors together into one number. First, 1 horsepower is defined as 550 foot-pounds per second (read How Horsepower Works to find out how they got that number). The units of torque are pound-feet.
What is the difference between HP and torque?
What’s the difference? In very simple terms, torque allows you to feel the sensation of acceleration when you put your foot down, while horsepower is your overall speed and power. This makes sense when you consider that horsepower is calculated from torque.
How do you explain torque VS horsepower?
Torque expresses the turning ability of the engine (the ability to turn its flywheel) and horsepower means the total power output of the engine. In very simple terms, torque is the force you feel pushing you back in your seat on acceleration, while horsepower is the speed achieved at the end of that acceleration.
Is 400 pounds of torque good?
Having 400 pounds of torque down low means you have more horsepower down low. Having 400 pounds of torque up high means you have even more horsepower then you had down low.
What is Newton meters to foot-pounds?
One foot-pound (ft/lb) is equal to 1.356 newton-meters (Nm). To convert newton-meters (Nm) to foot-pounds (ft/lbs) all you need to do is divide your figure (Nm) by 1.356.
What is a lot of torque for a car?
It’s worth noting that engines producing much more than 400 Nm (295 lb/ft) of torque, whether petrol or diesel, are usually at their best teamed with an automatic gearbox. Beyond 500 Nm (369 lb/ft), most engines come with an automatic gearbox anyway since they’re better able to cope with an engine that strong.
Is work and torque the same thing?
Hint :Torque is the rotational equivalent of linear force which causes an angular acceleration and angular acceleration is the rate of change of the angular velocity with respect to the time. Work can be defined as the product of force and distance travelled.
How do you calculate pound-force?
1. Use Newton’s 2nd Law (F=ma) to find weight in lbm∙ft/s2. 2 2. Convert weight from lbm∙ft/s2 to lbf using the relationship 1 lbf=32.174 lbm∙ft/s2.
Why is bullet energy in ft lbs?
The muzzle energy of a bullet is a measurement of its destructive potential at the moment it exits the barrel. Also known as kinetic energy, we measure it in units of foot pound-force, or ft lb. One unit of ft lbs is the energy that transfers by applying one pound of force through a linear displacement of one foot.
How many ft lbs is lethal?
A commonly accepted threshold for the minimum amount of kinetic energy needed to kill an elk is 1500 ft-lbs. For whitetail deer, the minimum amount of kinetic energy is 1000 ft-lbs. We’ve all probably heard stories of hunters taking elk with a . 243 Win.
What does foot pounds per second mean?
Medical Definition of foot-pound-second : being or relating to a system of units based upon the foot as the unit of length, the pound as the unit of weight or mass, and the second as the unit of time —abbreviation fps.
What does PSI stand for in science?
Pounds per square inch (PSI) is a measurement of pressure in the Imperial system of measurement. PSI is commonly used to measure the pressure of gasses (pneumatic pressure) or liquids (hydraulic pressure).
Is pound-force the same as PSI?
Basic Principle of Unit Conversion PSI is a unit of measure for pressure, and pressure (PSI) is the amount of force (lbf) applied per unit of area (in2). The equations below illustrate this. To convert PSI to lbs, simply multiply the pressure by the area over which the force is applied.