The other important thing is that your velocity ladies and your velocity must be less than 20 meters per second. Why is it supposed to be less than 20 meters per second? Well it's because obviously ladies and gentlemen these are two cars which are approaching with each other at a speed of velocity of 20 meters per second.
As soon as they collide there's no way a you know their velocities can increase unlike if this was moving in that direction and this was also moving in the same direction. But this one at the higher speed, size that it is this one maybe that's when we can have a velocity of this as greater than its initial velocity. I'm not sure if it makes sense ladies, so you just need to apply your mind on this type of questions ladies and gentlemen.
There's no way after collision and velocity can increase okay, so this serves as a guide that if we get a velocity which is greater than 20 meters per second, then we should suspect that something during our calculations went wrong okay.
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