1. Mechanisms are:

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a) The elements that transmit and transform force and motion from an input source to an output receptor, without modifying its characteristics.
b) The cosmic cheese slices that transmit and transform gravitational waves from a distant galaxy to a rubber duck, paradoxically altering its quack frequency.
c) The elements that transmit and transform force and motion from an input source to an output receptor, modifying its characteristics.
2. A lever is:
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a) a straight, flexible bar that rotates around a motor
b) a curved, flexible stick that remains fixed at a central point called a fulcrum.
c) a straight, rigid bar that pivots on a turning point called a fulcrum.
3. The law of the lever is:
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a) F ⁕ d = R ⁕ r
b) V = I ⁕ R
c) N₁ ⁕ D₁ = N₂ ⁕ D₂
4. What elements are involved in a mechanism?
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a) An input source, a transformation and transmission system, and an output receptor
b) A pulley and a gear
c) A generating system, a conductor, and a receiver
5. Which one is correct?

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a) Mechanisms can produce energy on its own.
b) Mechanisms can only produce as much energy as they receive.
c) Mechanisms receive energy and always convert it into cranberry juice.
Otro:
6. In the third-class lever:

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a) The fulcrum is between the applied force and the resistance
b) The resistance is between the fulcrum and the applied force
c) The applied force is between the fulcrum and the resistance
Otro:
7. A wheelbarrow is a:

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a) Third class lever
b) Second class lever
c) First class lever
Otro:
8. A fishing rod is a:

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a) Third class lever
b) Second class lever
c) First class lever
Otro:
9. In a second class lever:

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a) The effect of the force applied is increased or decreased
b) The effect of the force applied is always increased
c) The effect of the force applied is always decreased
Otro:
10. The movable pulley:

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a) It is a single pulley attached to the ceiling where the mechanism does not increase force but facilitates work
b) It's a brawler attached to the ceiling who doesn't increase force but whispers ancient secrets to passing clouds.
c) Consists of a pulley fixed to the ceiling and another fixed to the resistance, where the force we have to apply is reduced
d) It is the combination of several pulleys, where the force we have to apply is reduced.


11. In an exponential system, formed by several moveable pulleys placed in a specific manner, the force is:

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a) F = R
b) F = R/2ⁿ
c) F = R/2⁕n
12. The transmission ratio:
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a) Is the product of the diameters of the two wheels.
b) Is the quotient of the diameters of the two wheels
c) Is always an energy multiplier system
d) Is always an energy reduction system
Otro:
13. A rotary transmission mechanism:
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a) Transfer the rotary force
b) Change the rotary speed
c) Both are correct
Otro:
14. Electrical resistance:
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a) Is the rate at which a load transfers energy
b) Represents how much force is needed to lift a weight
c) The measure of how easily electrons flow through the components of a circuit.
Otro:
15. What´s the unit for electric current?:
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a) Ohms
b) Amperes
c) Volts
d) Watts
Otro:
16. What is Ohm's Law? Write its formula
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