3 en la figura 3 se muestra una sierra reciproca usando el...

3.- En la figura # 3 se muestra una sierra reciproca. Usando el método analítico y conociendo que para la posición mostrada $\theta_3 = -17.87^\circ$ y d = -3.511"; determine la velocidad lineal de la hoja cuando la manivela "la rueda" gira en sentido antihorario a 1500 rpm. ("= pulg.) Y .50" Crank wheel X Blade 3.25" 130° .65" Figura # 3

The diagram shows the mechanism for a handheld reciprocating saw. At the instant shown, the connecting rod BC is joined to the rotating disk at B. The angle it makes with the horizontal is 55°. If the disk A is rotating at a constant 2000 RPM, what is the velocity of the saw blade? i) Use a velocity diagram to solve this problem. (7 marks) {Hint: You can use trigonometry to find the distance from B to the line of the velocity of C, which you can use to find the angle BC makes. Also, for your diagram, use a scale of 5 cm = 1 m/s and make your origin in the upper left side of your paper. You can draw a scale diagram of the saw if you want, but it is not necessary.} ii) Use an acceleration diagram to find the acceleration of the blade at this instant. (3 marks) {Hint: Start your diagram at the right side of the page and use a scale of 1 cm = 50 m/s²} Hand in neat drawings with relevant calculations on the appropriate page.

Adi S.

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