Define machine. Shortly explain lever,ramp,wedge,screw,pulley.
Answers
A simple machine is a mechanical device that changes the direction or magnitude of a force.
Lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types.
Ramp
Ramp agents are responsible for loading and unloading aircraft baggage, guiding planes to and from their gates, operating baggage carts, de-icing planes and performing other airplane servicing duties. You will work either as an airport or airline-specific employee, depending on the airport at which you work.
Wedge
a piece of wood, metal, etc. having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
Screw
a short, slender, sharp-pointed metal pin with a raised helical thread running round it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place.
Pulley
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or bell.
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Answer:
a machine is a device which help us to do our work by applying lesss force and less energy.
LEVER is a simple machine which we use in our daily life.a lever is a rod which can turn about a fixed point called the fulcrum.
RAMP is a sloping surface .
WEDGE is a simple machine having a sharp edge which is foed by two inclined plane .
SCREW is a simple machine which appears like an inclined plane wound around a rod with a pointed tip.
PULLEY is a simple machine by which the direction of effort is changed to raise up a load.