This is a special combination of fixed and movable pulleys. The more pulleys we have, the more complex the mechanism, but the easier it is to lift the load. Look at these two compound pulley systems (n is the number of movable pulleys): Movable and compound pulleys can be used for lifts and cranes Watch the …
Listen to the audio below and try to do the exercise about Pulleys. You have 2 tries!! Don’t fail! Download Audio Pulleys listening exercise
To achieve the rigidity of a structure (which is not deformed), the profiles must form triangular cells. Cables, bars and braces can be used for this purpose. A structure is made up by 4 bars that is easily deformable. However, a structure composed of 3 bars may not deform and for this reason most of …
Linear transmission of motion Linear transmission mechanisms transmit motion and force through a motor to another point. Levers A lever is a rigid bar that turns around a point called a fulcrum. At one end of the bar, force (F) is applied to move a resistance or load (R) at the other end of the …
Structural Conditions There are three conditions for a structure to work well: Types of Efforts
What’s a structure? Everything has a structure. humans have skeleton, bicycles have a frame, houses have columns, beams and a roof. Structure exercise in you notebook Try to draw the following structures in your notebook. The structures / buildings shown below are famous and well known. Write the name of each structure / building under each picture. If …
Listen to the recording and fill the blanks: _______________ bear forces statically, that is, without moving. ______________, on the other hand, allow objects to move. They ____________ and _____________ force and motion from a motor to a ______________. They make work easier and more comfortable for human beings. Download audio
Following the (x,y) coordinates, look for the ships or parts of ships. (8,10) (7,6) (10,4) (7,8)
Following the (x,y) coordinates, look for the ships or parts of ships. (7,5) (3,1) (9,1) (5,4)
Following the (x,y) coordinates, look for the ships or parts of ships. (3,9) (7,4) (5,6) (10,4) Number 1 and 2 are drawn in the picture.