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Introducción a Máquinas
Simples y Motorizadas
Avanzando con Máquinas
Simples y Motorizadas
2009686
2009687
8+ años
Con estas actividades los estudiantes obtienen un
conocimiento básico de máquinas simples, estructuras y
mecanismos. Las actividades presentan 37 actividades
de modelos de principios, 14 actividades principales,
incluyendo actividades de extensión, y seis tareas de solución
de problemas. Las animaciones en Flash presentan las
actividades. Incluyen notas para el profesor, hojas de trabajo
para los estudiantes y glosario.
10+ años
Estas actividades permiten a los estudiantes conocer a
profundidad las máquinas simples, mecanismos, estructuras
y ventaja mecánica. Incluye 38 actividades de modelos
de principios, cuatro actividades principales, incluyendo
actividades de extensión, y ocho tareas de solución de
problemas. Las actividades se presentan a los estudiantes
mediante videos de la vida real. Incluyen notas para el profesor,
hojas de trabajo para los estudiantes y glosario.
Aprendizaje esperado
Aprendizaje esperado
• Investiga los principios de las máquinas simples,
mecanismos y estructuras
• Experimenta con fuerzas equilibradas y
desequilibradas
• Experimenta con fricción
• Captura, almacena y transfiere la energía del viento
• Mide distancia, tiempo, velocidad y peso
• Calibra balanzas
• Investiga las fuerzas motorizadas, movimiento,
velocidad y potencia
• Investiga los principios de las máquinas simples,
mecanismos y estructuras
• Ventaja mecánica
• Fuerzas equilibradas y desequilibradas
• Equilibrio
• Polispasto
• Efecto de la fuerza en un objeto
• Experimenta con fricción
• Calcula velocidad, distancia, tiempo y peso
• Identifica las variables dependientes e independientes
Student Worksheet
Teacher’s Notes
Beam Balance
Beam Balance
Name(s):
Science
Build the Beam Balance and Loads
Date and Subject:
(Building Instruction 15A and 15B to page 9, step 9)
• Forces
• Make sure the arm moves up and down freely and
the Beam Balance is in a state of equilibrium
• Simple machines – Lever
Technology
• Assembling components
• Construct simple machines
• Evaluating
• Mechanical advantage
• Properties of materials
Engineering
Why is it in a state of equilibrium?
• Test and evaluate before making improvements
Mathematics
• Determine percent of error
• Develop, analyze, and explain methods for
Place the load and efforts as shown and use the formulas for levers to find the mechanical advantage and to explain
what happens.
solving
problems
involving
First, observe the mechanical advantage of Beam Balance A.
proportions,
Then use the formula for calculating the amount of effort needed to lift a given load to explain why the Beam Balance
is in a state of equilibrium.
levels of
precision
• Solve problems involving scale factors, using ratio and proportion
Next, follow the same procedure for Beam Balance B and C.
Use this formula to help explain why each model is balanced Effort x length of effort arm = Load x length of load arm.
Vocabulary
• Equilibrium
• Fulcrum
• Levers
• Load
• Weight
Mechanical
advantage
Weight of load
Load distance
from fulcrum
Weight of effort
Effort distance
from fulcrum
A
Other materials required
• Measuring tape
• Calibrated weighing machine
(page 10, step 10)
B
(page 11, step 11)
C
(page 12, step 12)
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Beam Balance
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Teacher’s Notes
Connect
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Student Worksheet
Beam Balance
How much does it weigh?
Your challenge is to use the balance to work out the weight
of assembly A.
A
Put assembly A one arm and balance it with preassembled
weights on the other arm. Use these positions to calculate
the weight of assembly A.
Use the calibrated weighing machine to check your
accuracy.
Build your own set of weights from LEGO® parts and test
their accuracy.
Calculated weight of load
Measured weight of load
Percentage of accuracy
A
The simplest weighing machine is a beam balance. The original form of a balance consisted of
a beam with a fulcrum at its center. A change of weigh on either side of the balance will change
the beams positioning and effect the balance achieved.
You will build a model Beam Balance and investigate how its function is influenced by changes
in weight and position.
Hint:
Find out how accurate your calculation was by
finding the difference between the actual and
calculated weight. Then divide the difference with
the actual weight and multiply it by 100.
Explain your findings:
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edutecnologica.com.ar
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Los colores y diseños decorativos de los elementos pueden variar.