6.4. Which one of the following equations is dimensionally homogenous? Show your proof. a F = ma b. F= m- R C. F(t, -1 ) = m(V, -V,) d. F = mV e. F = m (V -V) (1 , - 1 ) where F = force (N) m = mass (kg) a = acceleration (m/s=) V= velocity (m/s) R = radius (m) = time (s)