Question

a rectangular wooden block has mass 4 kg the Length breadth and height of this block are 50 cm 25 cm and 10 cm respectively find the pressure on the table top (A)when the wooden block is kept with its surface measuring 50 cm into 25 CM on the table.
(B) when the wooden block is kept with its surface measuring 25 cm into 10 cm on the table where G is equals to 10 metre per second





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Answer 1

Answer:

A)3.125 N/msquare. B)6.25N/m^2

Explanation:

mass=4kg

g=10m/s

we know that ,

F=m×a

F=4×10

F=40N

A)area of first rectangle =25×50=1250sqcm

but it is in cm

in metre it is 125m

pressure =force/area

=40/125

=3.125N/m^2

B)@of second rectangle =25×10

=250

pressure =40/250

=6.25N/m^2

Answer 2

Answer:

1) 320 pa

2) 1600 pa

Explanation:

1) Mass = 4kg

Force= ma 4× 10 =40

Area = 0.5 m ×0.25m = 0.125 m^2

pressure = force / area  

40/0.125= 320 pa

2) force =40 N

Area = 0.25 m × 0.1m

Area = 0.025 m^2

Pressure = force/ area

40/0.025

1600 pa