The formula for calculating the common velocity of two identical blocks after collision is: v = (m1v1 + m2v2) / (m1 + m2), where v is the common velocity, m1 and m2 are the masses of the two blocks, and v1 and v2 are their respective velocities before the collision.
The direction of the common velocity after collision can be determined by considering the conservation of momentum. If the total momentum of the system is conserved, the direction of the common velocity will be in the same direction as the initial momentum of the two blocks.
No, this formula is specifically for calculating the common velocity of two identical blocks after collision. For non-identical blocks, you would need to use the formula for conservation of momentum and solve for the final velocity of the system.
The units for the common velocity will depend on the units used for mass and velocity in the formula. If mass is given in kilograms and velocity in meters per second, then the common velocity will have units of meters per second.
No, this formula can be used for any number of identical blocks, as long as their masses and velocities before the collision are known. However, for simplicity, it is usually used for two blocks at a time.