Question

A rectangular wooden block has mass of 4kg. The length breadth and height of this wooden block are 50cm,25cm,10cm respectively.Findthe preeuse on the table top:

(i) when the wooden block is kept with its surface measuring 50cm x 25cm on the table

(ii)when the wooden block is kept with its surface measuring 25cm x 10cm on the table

Answer 1

pressure is equal to force exerted by a object over the area which the force is acting on
-p=F/a
-To find force in this situation, find weight by multiplying mass by the acceleration due to gravity, which is 9.8m/s^2, or 10, depending on which value is used in your class syllabus
-find the area of the surface of the block on the table (in meters squared)
-divide force of weight by area of block on table
ex: a book weighs 2kg, it's surface on the table is 20cm*10cm
-first, find area in m^2   a=l*w=0.2m*0.1m=0.02m^2 
-then find force of weight F=mg     F=2*9.8=19.6N
so p=F/a   p=19.6/0.02
p=980N/m^2=980Pa     *note-unit of pressure is pascals (Pa), and it is equivalent to N/m^2

Answer 2

Answer:

F=W=m.g

F=W =4*10(considering g as 10)

F=W =40N

a)

P=F/A

P=40N/50CM*25CM

​P=40N/1250cm sq

​P=40N/0.125m sq

P=320 N/m sq (Pa)

similarly for case (b

Explanation:

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