Question

A boy carries his school bag on his back. The
pressure experienced due to bag strips have
magnitude 20 SI unit. The correct representation
of unit is
(2) N/(meter)
(1) N/m/m
(3) N/m
(4) Newton/m2​

Answer 1

Explanation:

Newton/ m² is SI unit that is also pascal....

Answer 2

Answer:

The correct representation of unit is (4) Newton/m².

Explanation:

• Pressure: The applied force per unit area is called pressure. The formula for pressure is: Pressure = $\frac{Force}{Area}$
• Unit: SI unit of Pressure = $\frac{SI unit of force}{SI unit of area}$ = $\frac{Newton}{metre^2}$ = N/m².
• The pressure is inversely proportional to the surface area. If the area increased, then the pressure will decrease when the force is constant. Here weight of the school bag is constant, so if the stripe of the bag becomes wide then the area will increase and pressure will decrease. The boy can carry the bag easily.
• Here the magnitude of pressure is 20 SI unit = 20 N/m². It indicates 20 N force is applied by the bag per 1 m² area.

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