Physics

Lever Calculator

Find the effort force needed on a lever.

Load (N)

Load arm length

Effort arm length

Calculated Output

Effort force (N) 150

Mechanical advantage 4

Formula: effort = load × load arm ÷ effort arm

Step-by-Step Breakdown

1. Values used:

2. Load = 600 N

3. Load arm length = 0.5

4. Effort arm length = 2

6. Load x Load arm length = 600 x 0.5 = 300

7. Effort force = (Load x Load arm length) / Effort arm length = 300 / 2 = 150N

8. Mechanical advantage = 4

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The math behind it

At balance, load × load arm = effort × effort arm, so effort = load × load arm ÷ effort arm.

600 N load, 0.5 m vs 2 m → 150 N effort (MA 4).

Longer effort arm?

Less effort needed — that's the lever's advantage.