Given this equation: m(moving) = m(rest) / (1-(u/c)^2)^1/2

Calculate the mass of a tennis ball moving at the speed of light

u and c are the speed of the particles and light

the mass of the tennis ball is 6.0x10^-2

speed of light= 3.0x10^8

it doesn't have to be this equation

Thanksssss!!