(a) James has the most momentum which is 294 kgm/s.
(b) The resultant force acting on Basma is 90.78 N.
(c) The time taken for James to stop is 3.2 seconds.
Momentum of James: P = mv = 98 x 3 = 294 kgm/s
Momentum of Basma: P = mv = 59 x 4 = 236 kgm/s
F = ma = mv/t = P/t = 236/2.6 = 90.78 N
F = P/t
t = P/F
t = 294/90.78
t = 3.2 s
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