1. A man is walking inside a railway boxcar at 3.0 m/s (N) relative to the boxcar. The boxcar is rolling along a ferryboat at 5.0 m/s (S) relative to the ferryboat. The ferryboat is heading north at 4.0 m/s. What is the velocity of the man relative to a) the ferryboat b) the water

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

overcharge is the right answer system

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