JEE Mains 2020 Model Paper 1 New Pattern

Mass of bullet, m = 50g = 0.05kg
Velocity of bullet, υ = 150ms−1
Mass of tiger, M = 60 kg
Velocity of tiger, V = 10ms−1
Let n be the number of bullets required to be pumped into the tiger to stop him in his track.
According to the laws of conservation of momentum,
n × mv = MV or n =

MV

mυ

=

60×10

0.05×150

= 80