A white pool ball of mass 0.60 kg moving at 12 m/s collides with a 0.2 kg red pool ball initially at rest. After the collisions, the white pool ball continues in the same direction with a velocity of 6.0 m/s. Neglecting friction the momentum of the red pool ball after the collision is kg•m/s.

3.6 kgm/s

Explanation:

By conservation of momentum :

(0.6*12) + 0 = (0.6*6) + p_2f

p_2f = 3.6

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when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min