Question

2
26. What will be the pressure when 30 N
force is applied on 120 cm² area?
(a) 2.5 x 10' N/m (b) 5 x 104 N/m
(c) 2.5 x 10² N/m? (d) 5 x 10' N/m
​

Answer 1

Answer:

2.5 x 10³ N/m

(None of the options is correct)

Step-by-step explanation:

Given Area = 120 cm² = 0.012 m²

Given Force = 30 N

thus, pressure = 30/0.012 N/m = 30000/12 N/m = 2500 N/m = 2.5 x 10³ N/m

Answer 2

Required Answer:-

Question:

• What will be the pressure when 30N force is applied on 120cm² area?

Solution:

Given,

1. Thrust = 30 N.
2. Area of contact = 120cm²

At first, convert 120cm² to m².

1m² = 100 × 100 cm²

⟹ 1m² = 10⁴ cm²

⟹ 1cm² = 10⁻⁴ m².

So,

120cm² = 120 × 10⁻⁴ m²

= 1.2 × 10⁻²m²

Now, Pressure is calculated by using the given formula,

⟹ Pressure = Thrust/Area

Putting the values, we get,

⟹ P = 30/(1.2 × 10⁻²) N/m²

⟹ P = 30/1.2 × 10² N/m²

⟹ P = 25 × 10² N/m²

⟹ P = 2.5 × 10³ N/m²

⟹ P = 2.5 × 10³ Pa

Hence, the pressure exerted when 30N force is applied on 120cm² area is 2.5 × 10³Pa.

Answer:

• Pressure exerted - 2.5 × 10³ Pa.