Question

a bucket contains water filled upto a height 15cm. the bucket is tied with a rope which is passed over a frictionless light pulley and the other end of the rope is tied to a weight of mass wish is half of that of the (bucket+water). the water pressure above atmosphere pressure at the botton is?

Answer 1

The water pressure above atmospheric pressure at the bottom is 10³ Pascal

Given-

• Height of water in bucket = 15 cm

Let the total mass of the bucket which contains water is M

So, mass of the block is M/2

So, acceleration will be

a = (M-M/2)g/ M+M/2 = g/3

g effective on water is = g-g/3 = 2g/3

Water pressure above atmospheric pressure is

ΔP = ρ geff h

By substituting the values we get

ΔP = 10³ × 2/3 × 10 × 15 × 10⁻²

ΔP = 10³ Pascal