A note on the temperature and energy of four-dimensional black holes from an entropic force

We investigate the temperature and energy on holographic screens for four-dimensional black holes with the entropic force idea proposed by Verlinde. We find that the 'Unruh-Verlinde temperature' is equal to theHawking temperature on the horizon, and can be considered as a generalized Hawking temperature on the holographic screen outside the horizons. The energy on the holographic screen is not the black hole mass M but the reduced mass M-0, which is related to the black hole parameters. With the replacement of the black hole mass M by the reduced mass M-0, the entropic force can be written as F = GmM(0)/r(2), which could be tested by experiments.