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CBSE Class 9 Answered

boxes a and b each of mass 2 kg having dimension 20 cm to 10 cm into 8 cm and 40 cm into 30 cm and to 15 January respective at kept on a horizontal surface as shown the figure the ratio of pressure accepted by box a on the surface accepted by box be on the surface is take g 10 m per second
Asked by arushiarushi921 | 11 Oct, 2023, 08:45: PM
answered-by-expert Expert Answer
As the figure in question is missing. 
We assume that the box, is kept as above. 
Mass of box A and B = 2 kg respectively 
F = m x a = mg = 2 x 10 = 20 N 
Dimensions of box A = 20 cm x 10 cm x 8 cm = 0.2 m x 0.1 m x 0.08 m 
Surface area of box A in contact with horizontal surface = 20 cm x 10 cm = 0.2 m x 0.1 m 
Dimensions of box B = 40 cm x 30 cm x 15 cm = 0.4 m x 0.3 m x 0.15 m 
Surface area of box B in contact with horizontal surface = 0.4 m x 0.3 m 
Thus, 
Pressure by box A, PA = 20/0.02 = 10 x 102 Pa
Pressure by box B, PB = 20/0.12 =  166 Pa 
PA : PB = 1000/166.66 = 6:1 
 
Thus, the ratio of pressure exerted by box A on box B is 6:1 
Answered by Shiwani Sawant | 12 Oct, 2023, 03:24: PM

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boxes a and b each of mass 2 kg having dimension 20 cm to 10 cm into 8 cm and 40 cm into 30 cm and to 15 January respective at kept on a horizontal surface as shown the figure the ratio of pressure accepted by box a on the surface accepted by box be on the surface is take g 10 m per second
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