Object A travels at a constant velocity of 2.0 m/s right, and object B travels in the same direction at a constant velocity of 3.0 m/s. If object B starts 1.0 min after object A from the same position, how
many seconds will it take object B to catch object A?

==> Object A travels for 60 seconds before Object B starts out.

==> Object A moves at 2 m/s.

==> So Object A has a lead of 120 m when Object B starts out.

==> Object B moves at 3 m/s . . . 1 m/s faster than Object A.

==> So Object B catches up on Object A by 1 m every second.

==> Object B closes up Object A's lead of 120 m in 120 seconds.  

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be subject to a force andchange its motion