Question

Two particle comes towards each other with a speed of 0.7 c, with respect to the laboratory. What is
their relative speed?
(a) 0.9 c
(b) 0.94 c
(c) c
(d) zero​
answer nahi araha hai 0.094c a raha hai

Answer 1

Answer:

Originally Answered: 2 particles travelling towards each other with speed 0.8c. what is their relative speed? Short answer: w = u-v/(1+(uv/c*c ...

Explanation:

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Answer 2

Answer:

The correct answer is Option B : $0.94c$

Explanation:

Here, we have to find the relative speed between two particles.

We can use the formula $v=u+v$

($v$ is the relative velocity)

Now, we can use the relative addition formula :

$u_x=\frac{u+v}{1+\frac{uv}{c^2} }$

When we substitute the values $v$ and $u$ as $0.7c$

$=\frac{(0.7c+0.7c)}{1+(0.7*0.7)}$

$=0.94c$

Hence we get that the correct answer is Option B : $0.94c$

Relative speed :

The speed of a moving body in relation to another is known as relative speed. When two bodies are travelling in the same direction, their difference is used to calculate their relative speed. When two bodies are moving in opposite directions, however, the relative speed is derived by summing their speeds.