Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A pressure of 1000 Pa, acts on a surface of area 15 cm2 by a block of mass ‘m’. Calculate ‘m’. Calculate the new pressure exerted by the same block if the

area of
contact with the surface becomes 10 cm2.



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
When a block of mass m is kept on a surface of area A = 15 cm², the weight acts on the surface, resulting in a pressure P.

   Force = m g = P * A
           m = 1000 Pa * 15 *10⁻⁴ m² / 10 m/sec²
               = 0.15 kg

 The block rests now on a smaller surface area.  So the weight of the block = m g acts (is spread) on the new surface area =>

          Pressure = 0.15 kg * 10 m/s² / [ 10 * 10⁻⁴  m² ]
                        = 1, 500 Pa
1 5 1
click on thanks button above please
select best answer pls
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts