What is the ideal effort needed for a lever with a 0.75 m effort arm and a 0.25 m load arm lifting a 300 N load?

To find the ideal effort needed to lift a load using a lever, you can use the principle of moments, which states that the effort multiplied by the length of the effort arm equals the load multiplied by the length of the load arm.

In this scenario, the effort arm is 0.75 meters, the load arm is 0.25 meters, and the load is 300 N. The relationship can be expressed with the formula:

[

\text{Effort} \times \text{Effort Arm} = \text{Load} \times \text{Load Arm}

]

Substituting the known values into the equation gives:

[

\text{Effort} \times 0.75 , \text{m} = 300 , \text{N} \times 0.25 , \text{m}

]

Calculating the right side:

[

300 , \text{N} \times 0.25 , \text{m} = 75 , \text{Nm}

]

Now, substituting this value back into the equation:

[

\text{Effort} \times 0.75 , \text{