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M1 help!!

A railway truck S of mass 2000 kg is travelling due east along a straight horizontal track with constant speed 12 m s–1. The truck S collides with a truck T which is travelling due west along the same track as S with constant speed 6 m s–1. The magnitude of the impulse of T on S is 28 800 Ns.
(a)Calculate the speed ofS immediately after the collision.
(b)State the direction of motion ofS immediately after the collision.

I've done (a) and got 2.4 ms-1
How do I do (b)?

Reply 1

etieti12

The direction is worked out through whether the velocity (speed) you got was negative or positive, and in which direction you had positive initial velocities.