Moments, levers and gears

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Question 2
Medium

Figure 1 shows a construction worker trying to lift a heavy concrete slab using a steel crowbar as a lever.

The concrete slab weighs 1200 N.

The worker can only exert a maximum downward force of 300 N.

The worker cannot lift the slab.

Explain, using calculations, why the worker cannot lift the concrete slab. Diagram showing a steel crowbar acting as a lever on a pivot. The concrete slab is on the left, 0.15 m from the pivot, exerting a downward force of 1200 N. The worker is on the right, applying a downward force of 300 N at a distance of 0.50 m from the pivot.

[3]

Moments, levers and gears Questions

  1. GCSE
  2. /Physics
  3. /Moments, levers and gears