Relative motion in 1 and 2 dimensions

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SUMMARY

The discussion focuses on the concept of relative motion in one and two dimensions, specifically how to calculate relative velocity between two objects. For one-dimensional motion, the relative velocity of object A moving at -5 m/s and object B at 5 m/s is calculated by subtracting B's velocity from A's, resulting in -10 m/s for A relative to B and 10 m/s for B relative to A. This principle extends to two-dimensional motion using vector subtraction to determine relative velocities in multiple dimensions.

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can someone explain the concept of relative motion in one and two dimensions?
how do i determine relative motion?
 
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Relative motion is the velocity an object is moving relative to somehting else.

So for one dimension:
If we have object A moveing in the -x direction with a velocity of -5 m/s and object B moving in the +x direction with a velocity 5m/s. If we wanted to know the relative velocity of A from B, it is the same as considering B still and A moving.

To find the answer we subtract B's velocity vector from A's velocity vector.
Avv -Bvv = -5m/s -(5m/s)

Relative velocity of A from B:
Avv -Bvv = -5m/s - 5m/s = -10ms

Relative velocity of B from A
Bvv-Avv = 5m/s -(-5m/s) =5m/s +5m/s) =10m/s

The same can be extended to two dimentions by using two dimensional vectors.
 
thanks i got it
 

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