Given,
m1 = 50 kg
m2 = 0.5 kg
u1 = 5 m/s
u2 = 5 m/s
v1 = ?
v2 = 15 m/s
The law of conservation of momentum states that
Final momentum equals initial momentum.
u1 = m1v1 + m2v2 (m1 + m2)
We obtain by substituting the values.
v1 = 4.9 m/s v2 = 4.9 m/s v3 = 4.9
As a result, the cycle and the girl’s speed drops by: 5 – 4.9 = 0.1 m/s.