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with respect to the earth, object 1 is moving at speed 0.90c to the right. With

ID: 2310542 • Letter: W

Question

with respect to the earth, object 1 is moving at speed 0.90c to the right. With respect to the earth, Object 2 is moving at speed 0.90c to the left. How fast is object 2 moving with respect to the object 1? with respect to the earth, object 1 is moving at speed 0.90c to the right. With respect to the earth, Object 2 is moving at speed 0.90c to the left. How fast is object 2 moving with respect to the object 1? with respect to the earth, object 1 is moving at speed 0.90c to the right. With respect to the earth, Object 2 is moving at speed 0.90c to the left. How fast is object 2 moving with respect to the object 1?

Explanation / Answer

Given u = 0.9 c

         v = 0.9 c

Speed of object 2 moving with respect to the object 1 is V = (u + v) /[1+(uv/c 2)]      

Since they are movint towards each other.

So, V = (0.9c+0.9c) /[1+(0.9cx0.9c /c 2)]

         = 1.8 c /[1+0.81]

         = 1.8 c /1.81

         = 0.994475 c