Nail tips exert tremendous pressures when they are hit by hammers because they exert a large force over a small area. What force (in N) must be exerted on a nail with a circular tip of 1.45 mm diameter to create a pressure of 2.33 ✕ 109 N/m2? (This high pressure is possible because the hammer striking the nail is brought to rest in such a short distance.)

The  force is  

Explanation:

From the question we are told that

   The  diameter is  

    The pressure is  

Generally the radius is mathematically represented as

 The  cross-sectional area of the nail is mathematically represented as

=>    

=>    

Generally the pressure is mathematically represented as

=>      

=>      

=>      

the answer is d. 4

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