Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more

Acceleration of Gravity and Newton's Second Law

Acceleration of gravity and Newton's Second Law - SI and Imperial units

Acceleration Units Converter

Convert between units of acceleration

American Standard Beams - S Beam

American Standard Beams ASTM A6 - Imperial units

American Wide Flange Beams

American Wide Flange Beams ASTM A6 in metric units

American Wide Flange Beams - W Beam

Dimensions of American Wide Flange Beams ASTM A6 - Imperial units

Area Moment of Inertia

Area Moment of Inertia, Moment of Inertia of an Area or Second Moment of Area

Area Moment of Inertia - Converter

Convert between Area Moment of Inertia units

Beam Loads - Support Force Calculator

Calculate beam load and supporting forces

Belt Transmissions - Length and Speed of Belt

Length and speed of belt and belt gearing

Belts - Power Transmission and Efficiency

Calculate belts power transmission and efficiency

Bollard Force

Bollard rope friction - load and effort force in rope

British Universal Columns and Beams

Properties of British Universal Steel Columns and Beams

Cable Loads

Force and tension in cables with uniform load s

Car Acceleration

Calculate acceleration of car

Center Mass

Calculate position of center mass

Center of Gravity

Bodies and their center of gravity

Center of Gravity - Center of Buoyancy

Stability - center of gravity and center of buoyancy

Centripetal and Centrifugal Force - Acceleration

Centripetal and centrifugal acceleration - forces due to circular motion

Conn-Rod Mechanism

The connecting rod mechanism

Conservation of Momentum

Momentum of a body is defined as the product of its mass and velocity

Density, Specific Weight and Specific Gravity

An introduction to density, specific weight and specific gravity - formulas with examples

Disk Brakes - Force and Torque

Force and torque by activated disk brakes


Energy is the capacity to do work

Engineering Materials

Typical properties of engineering materials like steel, plastics, ceramics and composites


Static equilibrium is when resultant force and resultant moment equals to zero

Fibre-reinforced Polymer Composites

Mechanical properties of fibers used to reinforce polymer composites

Flywheel Kinetic Energy

Kinetic energy stored in a flywheel - moment of inertia


Newton's third law - mass and acceleration

Force acting on Body Moving in Horizontal Plane

The force acting on a body moved in the horizontal plane

Force Acting on Body Moving on Inclined Plane

Required force to move a body up an inclined plane

Force and Tension in Rope due to Angle

Reduced load capacity in ropes, cables or lines - due to angle

Force Ratio

Force ratio - load force versus effort force

Formulas of Motion - Linear and Circular

Linear and angular (rotation) acceleration, velocity, speed and distance

Gear Reducing Formulas

Output torque, speed and horsepower when using gears

Gear Trains - Bicycle Gearing Calculator

Gear train transmission - bicycle gearing


Gears and effort force

Harmonic Oscillator

A simple harmonic oscillator

HE-A Steel Beams

Properties of HE-A profiled steel beams

HE-B Steel Beams

Properties of HE-B profiled steel beams

HE-M Steel Beams

Properties of HE-M profile steel beams

Hooke's Law

Hooke's law - force, elongation and spring constant

Improvised Torque Wrench

An improvised torque wrench with a luggage scale

Impulse and Impulse Force

Forces acting a very short time are called impulse forces

Kinetic Energy

Kinetic energy of a rigid body is the energy possessed by its motion


Excerting forces with levers

Lifting Wheels

Lifting wheels - loads and effort force

Mass and Weight

Mass and Weight - the Gravity Force

Modulus of Elasticity or Young's Modulus - and Tensile Modulus for common Materials

Young's Modulus - Tensile Modulus or Modulus of Elasticity - for steel, glass, wood and other common materials

Modulus of Rigidity

Shear Modulus (Modulus of Rigidity) is the elasticity coefficient for shearing or torsion force

Moment of Inertia

Moment of Inertia (Mass Moment of Inertia) depends on the mass of the object, its shape and its relative point of rotation - Radius of Gyration

Moment of Section - Unit Converter

Convert between Moment of Section (Inertia) units

Motors and Pulley Selection

Pulley (Sheave) selection charts for motors ranging 850 - 3450 rpm

Movement Ratio

Machines and movement ratio (velocity ratio)

Normal Flange I Beams

Properties of normal flange I profile steel beams

Poisson's ratio

When a material is stretched in one direction it tends to get thinner in the other two directions

Poisson's Ratio of Metals

Some metals and their Poisson's ratio

Potential Energy

Hydropower - elevation and potential energy


Power is the rate at which work is done or energy converted


Pulleys, blocks and tackles

Pulleys - Diameters and Speed

The pulley laws - driver and driven - diameter and rpm


The radian - unit of angle measure - and angular velocity

Range of a Projectile

Motion in two dimensions - calculate the range of a projectile

Rolling Resistance

Rolling friction and rolling resistance

Rotating Shafts and their Moments

Torsional moments acting on rotating shafts

Screw Jacks

Screw jacks and effort force

Section Modulus - Unit Converting

Convert between Section Modulus units

Steel Bolts - ASTM Grades

ASTM steel bolts - proof and tensile strength

Steel Bolts - Metric Grades

Metric steel bolts, screws and studs - proof and tensile strength

Steel Bolts - SAE Grades

SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength

Steels - Endurance Limits and Fatigue Stress

Endurance limits and fatigue stress for steels


Stiffness is resistance to deflection


Stress is force applied on cross-sectional area

Stress and Deflections in Beams

Beams and shafts - deflection and stress calculators

Stress in Thick-Walled Cylinders - or Tubes

Radial and tangential stress in thick-walled cylinders or tubes with closed ends - with internal and external pressure

Stress, Strain and Young's Modulus

Stress is force per unit area - strain is the deformation of a solid due to stress

Stresses in Thin-Walled Tubes or Cylinders

Hoop and longitudinal stresses thin-walled tubes or cylinders

SWG - Standard Wire Gauge

Imperial Standard Wire Gauge used for sheet metal and wire

Thermal Expansion - Stress and Force

Stress and force when thermal expansion is restricted

Torque - Work done and Power transmitted

The work done and power transmitted by a constant torque

Torque or Moment of Force - online Converter

Torque or moment - the tendency of a force to rotate an object

Torsion of Shafts

The torsion of solid or hollow shafts - Polar Moment of Inertia of Area

UNC and UNF Screw Threads

Unified Screw Threads UNC and UNF - ANSI B1.1 - Coarse series and UNF Fine series

Universal Gravitational Law

The gravitational attraction between two objects depends on the mass of the objects and the distance between them

Vector Addition

Online vector calculator - add vectors with different magnitude and direction

Weight of Beam - Stress and Strain

Stress and deformation of a vertical beam due to it's own weight

Wind Velocity and Wind Load

Wind load on surface - Wind load calculator

Wire Rope Slings

Sling angle and influence on capacity


Work done is the product of applied force and distance

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