The relativistic form of Newton's second law of motion is
1
F = \(\rm\frac{m c}{\sqrt{c^{2}−v^{2}}} \frac{d v}{d t}\)
2
F = \(\rm\frac{m \sqrt{c^{2}−v^{2}}}{c} \frac{d v}{d t}\)
3
F = \(\rm\frac{m c^{2}}{c^{2}−v^{2}} \frac{d v}{d t}\)
4
F = \(\rm m \frac{c^{2}−v^{2}}{c^{2}} \frac{d v}{d t}\)