Let’s start with some videos!

The theory of relativity states that as an object travels with velocity *v*, its rest mass changes to a mass *m* given by the formula where *c* is the speed of light.

By what factor is the rest mass of a spaceship multiplied if the ship travels at one-tenth the speed of light?

By what factor is the rest mass of a spaceship multiplied if the ship travels at one-half the speed of light?

By what factor is the rest mass of a spaceship multiplied if the ship travels at 90% the speed of light?

*Warp speed* is defined by the equation . If an object’s mass is twice its rest mass, what *warp* is it travelling at?

Use the relativistic mass formula to show that it is not possible for an object with mass to travel faster than the speed of light.