AP EAMCET Engineering 18 Sep 2020 Shift 1 Paper

According to the question body travels 10m in 10s, hence its velocity is given as
v=‌

10m

10s

=1m/s
∴ According to conservation of linear momentum. Initial total moment = Final total moment
0+0=M⋅v′+mv
where, v′ is velocity of person.
v′=−‌

mv

M

=−‌

10×1

90

=−‌

1

9

m}s
∴ Kinetic energy of person =‌

1

2

Mv′
=‌

1

2

×90×(−‌

1

9

)2=0.55