EXERCISE 22

(a) Imagine a vehicle traveling at half the speed of light (0.5c).  When it's not 
moving, it has a mass of 1,000 kg.  What's its current mass, as measured by a 
stationary  observer?  

(b) Imagine the same vehicle traveling at 70 percent the speed of light (0.7c). 
What's its current mass?

(c) Now imagine this vehicle moving at 99.9995 percent the speed of light.  What's 
its current mass?