A van driver alters the braking force on a van so that it moves at a constant speed downhill from P to Q. The magnitude of the change in the van’s kinetic energy is $\Delta E_k$. The magnitude of the change in its gravitational potential energy is $\Delta E_p$. Which statement is correct?
- A$\Delta E_k > \Delta E_p$
- B$\Delta E_k = \Delta E_p$
- C$\Delta E_p > \Delta E_k > 0$
- D$\Delta E_k = 0$