Answer:
The mass of the second boy is, m = 29.77 kg
Explanation:
Given data,
The mass of first boy, M = 43.8 kg
The velocity of first boy, V = -2.1 m/s
The velocity of second boy, v = 3.09 m/s
Then mass of second boy, m = ?
According to the law of conservation of momentum,
mv + MV = 0
m = - MV / v
Substituting the values,
m = 43.8 x 2.1 / 3.09
m = 29.77 kg
Hence, the mass of the second boy is, m = 29.77 kg
