Question

mechanical advantage for a lever https://www.youtube.com/watch?v=lujc156udcy how much force needs to be applied to a lever with a mechanical advantage of 4 to lift a 1200 n object? ma = of = 100n if = od = 2m id = ma = of = 50n if = od = 5m id = ma = of = 90n if = od = 6m id = ma = of = 200n if = od = 1m id =

Explanation:

Step1: Recall Mechanical Advantage Formula

The formula for mechanical advantage (MA) is \( MA=\frac{OF}{IF} \), where \( OF \) is the output force (load) and \( IF \) is the input force (effort). We know \( MA = 4 \) and \( OF=1200\ N \), and we need to find \( IF \). Rearranging the formula for \( IF \), we get \( IF=\frac{OF}{MA} \).

Step2: Substitute Values into Formula

Substitute \( OF = 1200\ N \) and \( MA = 4 \) into the formula: \( IF=\frac{1200}{4} \).

Step3: Calculate the Result

\( \frac{1200}{4}=300 \).

Answer:

The force that needs to be applied is \( 300\ N \).