Question

17. An object of mass 10 kg is dropped from
a height reaches the ground in 3 seconds.
Its momentum just before it hits the
ground is
(a) 29.4 kgm/s (b) 294 kg m/s
(c) zero
(d) 392 kgm/s​

Answer 1

Answer:

I think it will be of zero mass due to 3 seconds

Answer 2

Answer:

answer is option b

look ...

T=3

so T=

$\sqrt{2 \binom{h}{g } }$

and take g= 9.8

on solving this u will get h=44.1

then V=

$\sqrt{2gh}$

by this u get V=29.4

then put momentum =m*v

m*v=10*29.4=294Kgm/s