What is the momentum of a 2000-kg truck traveling at 35 m/s? A 1200-kg ferryboat

Question

What is the momentum of a 2000-kg truck traveling at 35 m/s?




A 1200-kg ferryboat is moving south at 20 m/s. What is themagnitude of its momentum?




A ball of mass 0.10 kg is dropped from a height of 12 m. Itsmomentum when it strikes the
ground is



Two identical 1500-kg cars are moving perpendicular to each other.One moves with a speed of 25 m/s due north and the other moves at15 m/s due east. What is the total momentum of
the system?


A handball of mass 0.10 kg, traveling horizontally at 30 m/s,strikes a wall and rebounds at 24 m/s. What is the change in themomentum of the ball?



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Explanation / Answer

Mass m = 2000 kg
Speed v = 35 m / s So, the momentum of a 2000-kg truck traveling at 35 m/sis P = mv = 70000 kg m / s
(b). mass m = 1200-kg Speed v = 20 m/s the magnitude of its momentum P = mv = 24000 kg m /s
(c). mass m = 0.10 kg height h = 12 m Its momentum when it strikes the ground is P = mv where v = speed when it strikes the ground = [ 2h/ g ]                                                                    =1.564 m / s Sp, P = 0.1564 kg m / s

(d). mass m = 1500 kg Speed v = 25 m / s momentum P = mv = 37500 kg m / s
the total momentum of the system = [ 37500^ 2 + 37500^2 ]                                                    = 53033 kg m / s

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