Question

Find the odd one out.

• A. Trackter tyres
• B.
  Bag straps
• C. Kitchen knife
• D. Round cloth on head

Answer 1

The correct option is C Kitchen knife

To understand this, we have to recall the formula:
$Pressure=\frac{Thrust\left(prependicularforce\right)}{Area}$
The porters use round cloth to increase the head area, so the pressure of the object will reduce.

Bags have thick straps to reduce pressure.

Tractors have wide tyres to reduce pressure.

Knife has sharp edge, which decreases area of contact and increases pressure for same amount of force.
Thus, it is the odd one out.