An ice-skater of mass $60\,\text{kg}$, moving at first at $3.0\,\text{m s}^{-1}$, slides over a level icy surface. The skater applies the brakes and stops after covering $5.0\,\text{m}$. The work done against the braking force equals the change in the skater’s kinetic energy. What is the braking force?
- A$18\,\text{N}$
- B$27\,\text{N}$
- C$54\,\text{N}$
- D$108\,\text{N}$