# M1 help!!Watch

#1
A railway truck S of mass 2000 kg is travelling due east along a straight horizontal track with constant speed 12 m sâ€“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 sâ€“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)?
0
7 years ago
#2
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.
0
7 years ago
#3
M1u1 + m2u2 = m1v1 + m2v2

It depends on the direction also, set W-e + you can calculate Vms-1 for T.
0
#4
Never mind. I got it. This was a dumb question sorry
0
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