# Power Requirement Friction

## Power needed to overcome friction and gravity | Physics Forums

May 02, 2013· a. The power required to overcome friction b. The power needed to overcome gravity c. The total power needed The problem I have is i don't know what i need to do to the incline. Please could someone guide me Homework Equations Power needed to overcome friction = friction force * velocity along surface The Attempt at a Solution Part a.

## Pipe Flow Calculations - Clarkson University

Power . The power required to overcome friction is related to the pressure drop through . Power =∆PQ or we can relate it to the head loss due to pipe friction via Power =γhQ f. Head Loss/Pressure Drop . The head loss . h f is related to the Fanning friction factor f through 2 f 2 LV hf Dg =

## Friction - Wikipedia

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction ("stiction") between non-moving surfaces, and kinetic friction between moving ...

## Chapter 7 Resistance and Powering of Ships

EHP – “Effective Horsepower” is the power required to move the ship’s hull at a given speed in the absence of propeller action. It is equal to the product of the resistance of a ship and the speed of the ship. This power is equal to the Brake Horsepower minus losses due to the gearbox,

## Vehicle Power Requirements - Walter Scott, Jr. College of ...

The power output requirement can be determined from the drag force given above and the vehicle velocity. P = F D V Given the mass of a vehicle and its frontal surface area, a plot can be drawn showing the power requirements for a range of speeds. The Power Requirement Applet plots this relationship.

## Pumping Water - Required Horsepower

P = power (kW) q = flow (liter/min) h = head (m) ρ = density (kg/m 3) (water 1000 kg/m 3) μ = pump efficiency (decimal value) Example - Power Required to Pump Water. The power required to pump 100 l/min water an elevation of 10 m (ex. friction loss in piping and efficiency = 1.0) can be calculated as

## Pressure loss in pipe systems (Darcy friction factor ...

The diameter obviously influences the pressure loss to the fifth power and thus has a decisive influence. In general, the larger the diameter, the lower the pressure loss! Note that the friction factor f is, however, dependent on the flow velocity. The flow velocity in turn depends on the volumetric flow rate and thus on the pipe diameter!

## Handy Charts and Formulas for the Pressure Washer Professional

These charts are accurate to the best of our knowledge. If you note any discrepancies, please e-mail Administrator.The above formulas are for information only, Hydro Tek recommends consulting a pressure washer professional for all matters where safety is an issue.

## POWER CABLE INSTALLATION GUIDE - Anixter

This publication is a collection of items of general information related to the subject of power cable. It is not intended to be nor should it be used as authority for design, construction, or use of power cable. ... Coefficient of Friction 14 Configuration 15 Weight Correction Factor 15 Sidewall Pressure 16 ... ICEA Support Requirements 31 NEC ...

## Torque, power requirement and stir zone geometry in ...

The torque, power requirement and stir zone geometry during friction stir welding of AA2524 aluminum alloy were modeled by solving the equations of conservation of mass, momentum and energy. The model predictions agreed well with the corresponding measured values for a wide range of welding speeds and tool rotational speeds when the heat ...

## Power needed to overcome friction and gravity | Physics Forums

May 02, 2013· a. The power required to overcome friction b. The power needed to overcome gravity c. The total power needed The problem I have is i don't know what i need to do to the incline. Please could someone guide me Homework Equations Power needed to overcome friction = friction force * velocity along surface The Attempt at a Solution Part a.

## Understanding Helicopter Power Requirements: The Power ...

Oct 10, 2017· Profile power is the power required to overcome the friction drag on the blades and push the rotor’s shape through the viscous air. It does not change significantly with a change in angle of attack and accounts for 15% to 40% of the main rotor power required in a hover.

## Pumping Water - Required Horsepower

P = power (kW) q = flow (liter/min) h = head (m) ρ = density (kg/m 3) (water 1000 kg/m 3) μ = pump efficiency (decimal value) Example - Power Required to Pump Water. The power required to pump 100 l/min water an elevation of 10 m (ex. friction loss in piping and efficiency = 1.0) can be calculated as

## Vehicle Power Requirements - Walter Scott, Jr. College of ...

The power output requirement can be determined from the drag force given above and the vehicle velocity. P = F D V Given the mass of a vehicle and its frontal surface area, a plot can be drawn showing the power requirements for a range of speeds. The Power Requirement Applet plots this relationship.

## Pressure Loss in Pipe - Friction Loss in Pipe - Nuclear Power

Pressure Loss in Pipe – Friction Loss. Pressure loss in pipe, which are associated with frictional energy loss per length of pipe depends on the flow velocity, pipe length, pipe diameter, and a friction factor based on the roughness of the pipe, and whether the flow is laminar or turbulent (i.e. the Reynolds number of the flow).. Although the pressure loss represents a loss of energy, it ...

## 13 . 2 Power Required - MIT

13. 2 Power Required Now we can look at the propulsion system requirements to maintain steady level flight since and Thus the power required (for steady level flight) takes the form of Figure 13.3. Figure 13.3: Typical power required curve for an aircraft. The velocity ...

## Pressure loss in pipe systems (Darcy friction factor ...

The diameter obviously influences the pressure loss to the fifth power and thus has a decisive influence. In general, the larger the diameter, the lower the pressure loss! Note that the friction factor f is, however, dependent on the flow velocity. The flow velocity in turn depends on the volumetric flow rate and thus on the pipe diameter!

## POWER CABLE INSTALLATION GUIDE - Anixter

This publication is a collection of items of general information related to the subject of power cable. It is not intended to be nor should it be used as authority for design, construction, or use of power cable. ... Coefficient of Friction 14 Configuration 15 Weight Correction Factor 15 Sidewall Pressure 16 ... ICEA Support Requirements 31 NEC ...

## Power - Physics Classroom

Power = Work / time or P = W / t . The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second. For historical reasons, the horsepower is occasionally used to describe the power delivered by a ...

## Torque, power requirement and stir zone geometry in ...

The torque, power requirement and stir zone geometry during friction stir welding of AA2524 aluminum alloy were modeled by solving the equations of conservation of mass, momentum and energy.

## Car - Required Power and Torque

Example - Car and required Engine Power. The required engine power for a car driving on a flat surface with constant speed 90 km/h with an aerodynamic resistance force 250 N and rolling resistance force 400 N and overall efficiency 0.85 - can be calculated as. P = ((250 N) + (400 N)) (90 km/h) (1000 m/km) (1/3600 h/s) / 0.85 = 19118 W = 19 kW

## Conveyor Power and Torque Calculator - EICAC

CONVEYOR POWER CALCULATOR. Use this calculator to calculate the force, torque and power required from a conveyor to move a load at an angle. If your conveyor is horizontal enter an angle of 0. Enter your values for the Mass, Diameter, Beltspeed, Friction and Angle; select your units as required.

## What is Pressure Loss in Pipe - Friction Loss in Pipe ...

The friction factor for laminar flow is independent of roughness of the pipe’s inner surface. ... This is a very significant increase in head loss, and shows why larger diameter pipes lead to much smaller pumping power requirements. Since the head loss is roughly proportional to the square of the flow rate, then if the flow rate is doubled, ...

## Understanding Helicopter Power Requirements: The Power ...

Oct 10, 2017· Profile power is the power required to overcome the friction drag on the blades and push the rotor’s shape through the viscous air. It does not change significantly with a change in angle of attack and accounts for 15% to 40% of the main rotor power required in a hover.

## Friction Manipulation | Superpower Wiki | Fandom

The ability to control friction. Sub-power to Physical Force Manipulation. 1 Also Called 2 Capabilities 3 Applications 4 Techniques 5 Variations 6 Associations 7 Known Users 8 Gallery Friction Control Tribokinesis User can manipulate, generate and otherwise control friction, the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each ...

## Engineering: Compressor Power Calculation

Apr 09, 2015· Power requirement The total power requirement of a compressor for a given duty is the sum of the gas power and the friction power. The gas power is directly proportional to head and mass flow and inversely proportional to efficiency. Mechanical losses in the bearings and, to a lesser extent, in the seals are the primary source of friction power.

## The Mathematics of Pumping Water - Royal Academy of ...

the power requirement is: 0 . 84 0. 694 · 10 . 39 · 9 . 81 · 1000 P = , or P = 84210 W = 84 . 21 k W Hence, we can say that to overcome the required head of 10.39 m, we n eed a variable speed pump with 84.21 W. C ONCLUSION The accurate calculation of the maximum and

## Simple Calculations for Cable Pulling | EC&M

Tension multipliers for various bending radii. Note: These multipliers are based on a coefficient of friction of 0.5. If the coefficient of friction is 1.0, you must square the multiplier. If the coefficient of friction is 0.75, you must raise the multipier to the 1 1/2 power. Step 1: …

## Calculating Conveyor Power for Bulk Handling | Rulmeca Corp

Calculate Belt Conveyor Power Requirements; Calculate Belt Tension Requirements; Plot Material Trajectory, Plot Material Cross Section. The program not only determines required power, but also displays all Motorized Pulleys available (for 60 Hz power …

## Handy Charts and Formulas for the Pressure Washer Professional

These charts are accurate to the best of our knowledge. If you note any discrepancies, please e-mail Administrator.The above formulas are for information only, Hydro Tek recommends consulting a pressure washer professional for all matters where safety is an issue.

## HOW TO design a pump system

How to determine friction head. Friction head is the amount of energy loss due to friction of the fluid moving through pipes and fittings. It takes a force to move the fluid against friction, in the same way that a force is required to lift a weight. The force is exerted in the same direction as the moving liquid and energy is expended.

## What is Head Loss - Pressure Loss - Definition

Water at 20°C is pumped through a smooth 12-cm-diameter pipe 10 km long, at a flow rate of 75 m 3 /h.The inlet is fed by a pump at an absolute pressure of 2.4 MPa. The exit is at standard atmospheric pressure (101 kPa) and is 200 m higher.. Calculate the frictional head loss H f, and compare it to the velocity head of the flow v 2 /(2g).. Solution:

## Power needed to climb constant slope at constant speed ...

Dec 11, 2012· Actually, power requirements for climbing can even decrease if you take into account diminishing gravity... I should have mentioned that by "vehicle" I meant an aircraft. Unlike a car, an aircraft must cope with effects of drag and gravity more than a car mostly subject to ground friction.

## Car - Required Power and Torque

Example - Car and required Engine Power. The required engine power for a car driving on a flat surface with constant speed 90 km/h with an aerodynamic resistance force 250 N and rolling resistance force 400 N and overall efficiency 0.85 - can be calculated as. P = ((250 N) + (400 N)) (90 km/h) (1000 m/km) (1/3600 h/s) / 0.85 = 19118 W = 19 kW

## What Is A Friction Clutch? Advantages and Applications ...

Requirement of good friction clutch. The following are considered during the design of the friction clutch. The coefficient of friction of contact surface should be high enough to hold the load with a minimum amount of axial force.

## Railgun - Wikipedia

A railgun is a linear motor device, typically designed as a weapon, that uses electromagnetic force to launch high velocity projectiles. The projectile normally does not contain explosives, instead relying on the projectile's high speed, mass, and kinetic energy to inflict damage. The railgun uses a pair of parallel conductors (rails), along which a sliding armature is accelerated by the ...

## Friction stir welding - Wikipedia

Friction stir welding (FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material. Heat is generated by friction between the rotating tool and the workpiece material, which leads to a softened region near the FSW tool.