Q; An electric scooter has a battery capable of supplying 140 Wh of energy. If f

Question

Q;
An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other lossesaccount for 60.0% of the energy usage, what altitude change can arider achieve when driving in hilly terrain, if the rider andscooter have a combined weight of 950N?
Q;
An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other lossesaccount for 60.0% of the energy usage, what altitude change can arider achieve when driving in hilly terrain, if the rider andscooter have a combined weight of 950N?

Explanation / Answer

             Given that the energy given by the battery is E = 140 Wh = 140*3600Ws              The loss of energy due to friction is Eloss= E*60%                Weightof the rider and scooter is W = 950 N   ------------------------------------------------------------------------------------------------------                     Then the net energy used to climb the hill is Ef= 140*3600Ws ( 1 - 0.60)                                                                                             =0.40*140*3600Ws                     From the conservation of energy mgh = Ef                                                                         W*h= Ef                                                                              h = Ef / W                                                                                  =0.40*140*3600Ws / 950N                                                                                 = --------- m   

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