MECHANISMS TEST

Surname: Name:

Class 3 ESO ___ Date: __ / __ / 2015

1) What force we have to make to lift a load of 50Kg ?. If we apply a force of 1000 Kg What resistance can we make?

2) Calculate the diameter must have the drive wheel of this system. What is the gear ratio ?

3) Calculate the output speed of the transmission system schema . It also indicates the direction of rotation of the wheels 2,3 and 4 .

Graduacin 2006-2015

4) How far you can place the fulcrum for the lever is in balance? What type of lever is it? Use the law of the lever to justify when this lever is helping us to lift the objet with less effort and when it is not helping us to lift it.

X+2 10

15 Kg 250Hg

20 1000 rpm 2500 rpm

36

9

72

5) Make a table and classify each type of mechanism and what type of motion has. If the crank goes at a speed of 2 rpm What would it be the output speed of the rest of the cogwheels and pulleys and the direction of each wheel? Give two examples where you can use this type of mechanism and why?.