Answer :The Momentum of a man riding his bicycle downhill is 400 kg m/s.
Step-by-step explanation:
Mass of the man of bicycle = 40 kg
Velocity of the bicycle = 10 m/s
Momentum = Mass × Velocity = 40 kg × 10 m/s = 400 kg m/s
The Momentum of a man riding his bicycle downhill is 400 kg m/s.