Name(s): ___________________________________ Section



Name: ___________________________________

Period: 1 2 3 4 5 6 7

Virtual Lab



Simple Machines

Activity 1: The wedge and lever

Lab Instructions

Set the length for your wedge based on the chart below. Record the force that was applied to make it successful. Repeat this using the other lengths.

Data Collection

Table 1: Wedge

|Length (cm) |Weight (N) |

|5 | |

|7.5 | |

|10 | |

|12.5 | |

|15 | |

|17.5 | |

|20 | |

Write a general statement explaining which wedges worked most efficiently.

Graphing Data

Make a connected line graph to look at the force required for all wedges you tested.

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Force (N)

Let’s move on to the lever:

Lab Instructions Continued

Select a placement for the fulcrum and record your data. Record effort distance, effort force and indicate whether or not it was successful. Repeat using various fulcrum placements.

Data Collection

Table 2: Lever

| |Effort Force (Fe) |Effort Distance (de) |Success? (yes or no) |

|1 | |1.00 | |

|2 | |1.25 | |

|3 | |1.50 | |

|4 | |1.75 | |

|5 | |2.00 | |

Use your data from table 2 to create a table showing work done.

Table 3

| |Work Input (J) |

|1 | |

|2 | |

|3 | |

|4 | |

|5 | |

What are the advantages of using a lever to lift this stone?

The stone has a weight of 3000 N (Fr) and you need to lift it 1 meter (dr). Use the same data again to complete table 4 which will help us look at mechanical advantage.

Table 4

| |IMA |AMA |

|1 | | |

|2 | | |

|3 | | |

|4 | | |

|5 | | |

Simple Machines

Activity 2: The ramp and pulley

Lab Instruction

Select a length for the inclined plane. Record the length, effort force and indicate whether or not it was successful. Repeat using various lengths.

Data Collection

Table 1: Inclined Plane

| |Inclined Plane Length (de) |Effort Force (Fe) |Success? (yes or no) |

|1 |3.00 | | |

|2 |3.33 | | |

|3 |3.66 | | |

|4 |4.00 | | |

|5 |4.33 | | |

Calculate the amount of work done to get the stone to the top of each inclined plane.

Table 2

| |Work Input (J) |

|1 | |

|2 | |

|3 | |

|4 | |

|5 | |

Graphing Data

Make a connected line graph to look at the length of the board and the amount of force required to move the object.

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Graphing Data

Use the number of supporting ropes and the length of rope used to lift our stone to complete this graph.

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|6 | | |

|7 | | |

Graphing Data

Use the thread distance and distance the wheel turned to make the following line graph.

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Number of threads/cm

How does the thread density affect the distance that the wheel has to turn?

Use the thread distance and effort force to make the following line graph.

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Number of threads/cm

How does the thread density affect the amount of effort force?

Lab Instruction Continued

Keep your thread density at 7 threads/cm. Change the wheel radius to the six given dimensions and record the effort force and distance turned for each example.

Data Collection

Table 2: Wheel & Axle

|Wheel Radius |Effort Force |Distance Turned |

|50 | | |

|60 | | |

|70 | | |

|80 | | |

|90 | | |

|100 | | |

What happens to the effort force as the radius increases?

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Length (cm)

Force (N)

# of supporting ropes

Distance wheel is turned

Effort Force

(N)

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