How fast would a meter stick be moving if the observer measures a length of 60 cm.

Required formula is

where L= length of a stick when it is moving with velocity v
L0=length of that stick when it is at rest
c= velocity of light

Ifound this on google “two vectors are equal if they have the same magnitude and direction. they are parallel if they have the same or opposite direction. we can combine vectors by adding them, the sum of two vectors is called the resultant.” i hope this you.