Question

Find force P required to slide the block B in the
arrangement shown in sketch. Also find the tension in
the cable. Weight of block A =500N
Weight of block B=1000N and u=0.2





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Answer 1

Dear Student,

The formula for pressure is:

Pressure = ForceArea

Assuming that the other two ways in this question means that when different faces of the cube are facing the ground:

1. Face 1:

Length = 30 cm, breadth = 10 cm

Area = 30 x 10 = 300 cm2

Force = 50 N

Pressure = 50 / 300 = 0.1667 N cm-2

2. Face 2:

Length = 30 cm, Height = 50 cm

Area = 30 x 50 = 1500 cm2

Pressure = 50 / 1500 = 0.033 N cm-2

3. Face 3:

Height = 50 cm , Breadth = 10 cm

Area = 10 x 50 = 500 cm2

Pressure = 50 / 500 = 0.1 N cm-2

Hope it helps.

Regards