# What does U mean in velocity?

## What does U mean in velocity?

u is initial velocity in m/s. t is time ins. For example, a car accelerates in 5 s from 25 m/s to 3 5m/s. Velocity is defined as a vector measurement ofthe rate and direction of motion.

**Why is E mc2 wrong?**

Einstein’s Second Mistake with E=MC. Einstein’s second mistake with his equation was in his failure to realize that the primary meaning of E=MC2is that it defines the mass of the photon as the truest measure of mass. Mass has energy that can be measured and energy has mass that can be weighed.

**Why is C Squared E mc2?**

Now we’re getting to the c² part of the equation, which serves the same purpose as the star-on and star-off machines in “The Sneetches.” The c stands for the speed of light, a universal constant, so the whole equation breaks down to this: Energy is equal to matter multiplied by the speed of light squared.

### How did Einstein come up with E MC?

Septem. In the fourth paper, Einstein explained the relationship between energy and mass. That is, E=mc2. In other words, energy = mass x the speed of light squared. In their interiors, atoms (mass) fuse together, creating the tremendous energy of the sun as described by Einstein’s famous equation.