Engineering mechanics lecture notes 1 PDF

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Professor Gilltro - Engineering mechanics lecture notes 1...

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mechanism an assembly of moving parts involved in or responsible for taking an input motion or force and transforming it to an output motion or force

kinematics a branch of engineering mechanics that studies motion without regard to force or mass of the things being moved

dynamics the branch of classical mechanics that is concerned with the effects of forces on the motion of objects

lever a machine consisting of a beam or rigid structure with a fixed hinge or fulcrum

pulley a wheel on an axle that is designed to support movement and change of direction of a cable or belt along its circumference

wheel & axle a simple machine generally consisting of a wheel attached to an axle so that motion and/or force can be transmitted from one to the other.

Inclined plane A flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load.

Wedge A triangular shaped tool used to separate two objects or portions of an object, lift up an object, or hold an object in place.

Screw An inclined plane wrapped around a cylinder, a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force.

Gear A toothed wheel that interacts with similar components to transfer/change motion from one place to another and/or gain a mechanical advantage.

Links Elements that join pairs together.

Element Any part of a mechanism or structure.

Momentum An objects mass multiplied by its velocity.

Work A force applied over a distance.

Power The rate at which work is done.

Torque The rotational equivalent of force.

Force A vector quantity acting on a body (mechanism) causing it to accelerate (move) at a predetermined magnitude (strength) and direction.

Linear motion A straight-line motion that occurs in one direction.

Reciprocating motion

Back and forth linear motion.

Rotary motion The motions of an object around an axel or center point.

Oscillating motion Back and forth movement in an arc.

Bevel gear A gear with a conical shape allowing the axles of the two interacting gears to be oriented at an angle other than parallel.

2nd Class lever A lever where the load is placed between the fulcrum and the effort

1st Class lever A lever where the fulcrum is placed between the effort and the load

3rd Class lever A lever where the effort is exerted between the load and the fulcrum

Worm gear A type of gear that is a single tooth wrapped around a cylinder like a screw.

Rack & pinion A type of linear actuator that comprises a pair of gears which convert rotational motion into linear motion.

Crank & slider A mechanism that consists of an arm attached to a rotating component which converts a rotational input motion to a different type of output motion.

Statics The branch of mechanics that is concerned with the analysis of loads (force and torque, or "moment") acting on physical systems that do not experience an acceleration (a=0), but rather, are in static equilibrium with their environment.

Crown gear A type of bevel gear which has teeth that project at right angles to the face of the wheel.

Cam & follower A device typically comprised of a rotating disc and a pin or roller that follows the profile of the disc. The particular profile of the cam determines the motion pattern of the follower....