During a second workout, the cyclist reduces the force on the friction pads by 50%, then p...

During a second workout, the cyclist reduces the force on the friction pads by 50%, then pedals for two limes the previous distance in  the previous time. How does the amount of energy dissipated by the pads in the second workout compare with energy dissipated in the first workout?

A. One-eighth as much

B. One-half as much

C. Equal

D. Two times as much