# Force Acting on Body Moving on Inclined Plane

## Required force to move a body up an inclined plane

If we neglect friction between the body and the plane - the force required to move the body up an inclined plane can be calculated as

Fp = W h / l

= W sin α

= m ag sin α                            (1)

where

Fp = pulling force (N, lbf)

W = m ag

=  gravity force - or weight of body (N, lbf)

h = elevation (m, ft)

l = length (m, ft)

α = elevation angle (degrees)

m = mass of body (kg, slugs)

ag = acceleration of gravity  (9.81 m/s2, 32.174 ft/s2)

By adding friction - (1) can be modified to

Fp = W (sin α + μ cos α)

= m ag (sin α + μ cos α)                            (2)

where

μ = friction coefficient

### Example - Pulling Force on Inclined Plane

A body with mass 1000 kg is located on a 10 degrees inclined plane. The pulling force without friction can be calculated as

Fp = (1000 kg) (9.81 m/s2) sin(10o)

= 1703 N

= 1.7 kN

### Online Inclined Plane Force Calculator - SI Units

The calculator below can be used to calculate required pulling force to move a body up an inclined plane.

mass of body - m - (kg)

elevation angle - α - (degrees)

friction coefficient - μ - (zero when neglecting friction)

### Online Inclined Plane Force Calculator - Imperial Units

mass of body - m - (slugs)

elevation angle - α - (degrees)

friction coefficient - μ - (zero when neglecting friction)

### Angle of Repose

A body resting on a plane inclined at at an angle α to the horizontal plane is in a state of equilibrium when the gravitational force tending to slide the body down the inclined plane is balanced by an equal and opposite frictional force acting up the inclined plane.

For equilibrium the "angle of response" α can be expressed as:

μ = Fp / Fn = (W sin α) / (W cos α) = tan α                                   (3)

## Related Topics

• Dynamics - Motion - velocity and acceleration, forces and torques
• Mechanics - Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more

## Tag Search

• en: forces inclined planes friction
• es: fuerzas de fricción planos inclinados
• de: Kräfte geneigten Ebenen Reibung

## Search the Engineering ToolBox

- "the most efficient way to navigate!"

## Engineering ToolBox - SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!