Moments, levers and gears

EasyMedium
12345678910111213141516171819202122232425262728293031323334353637383940
Question 12
Medium

Figure 1 shows a balanced wooden plank resting on a central pivot, used in a warehouse to balance two heavy loads.

Diagram showing a balanced plank resting on a triangular pivot at its center. On the left side of the plank, Box A is placed with a downward arrow labeled '240 N' and a horizontal distance of '1.50 m' from the central pivot. On the right side of the plank, Box B is placed with a downward arrow labeled 'weight W' and a horizontal distance of '0.85 m' from the central pivot.

Calculate the value of WWW, the weight of Box B.

Use the principle of moments and the equation:

the moment of W=the moment of the weight of Box A \text{the moment of } W = \text{the moment of the weight of Box A} the moment of W=the moment of the weight of Box A

Give your answer to 2 significant figures.

[3]

Moments, levers and gears Questions

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