If two bodies are in motion with velocities `barv_(1)` and `barv_(2)`

Options

A. `|V_(rel)|=sqrt(v_(1)^(2)+v_(2)^(2))`
B. `|v_(rel)|=|v_(1)pmv_(2)|`
C. `v_(rel)=0`
D. `v_(rel)`=c(speed of light)

Answer

A,B,C

Explanation

If two bodies are moving in same direction,`barv_(rel)` is the difference of velocities of 2 bodies and if they a moving in opposite directions, `v_(rel)` is the sum of 2 velocities, `|v_(rel)|=v_(1pmv_(2)|`
If two bodies are moving in the same direction with same velocity: `v_(rel)=0`
If two velocities are mutually perpendicular then `|v_(rel)|=sqrt(v_(1)^(2)+v_(2)^(2))`