JEE Mains 2020 Model Paper 3 New Pattern

Wt. of bucket = 0.75 x 9.8 = 7.35N after 3s,
Wt. of water collected = (0.25 x 3) x 9.8 = 7.35N
mgh =

1

2

mυi2
υ12 = 2gh
υ1 = √2gh
Force due to falling water
= |

m(υf−υi)

t

| = |

0.25(0−√2×9.8×2.6)

1s

| = 1.79 N
∴ Reading of scale after 3s = 7.35 + 7.35 + 1.79 = 16.49 N