(a(i))[1]
State the name of the energy store found in the battery.
(a(ii))[2]
Describe, in work-done terms, the sequence of energy transfer from the battery's energy store to the scooter's kinetic energy.
(b)[2]
The combined mass of the scooter and rider is $70\,\text{kg}$. Calculate the total kinetic energy of the rider and scooter when the scooter is moving at $4.0\,\text{m s}^{-1}$.
(c(i))[1]
The battery carries the label ‘energy capacity $0.35$ kilowatt-hour ($\text{kW h}$)’. Define what a kilowatt-hour means.
(c(ii))[2]
The scooter no longer operates because the battery is completely discharged (flat). This means there is no energy left stored in the battery. The battery is then recharged using a $70\,\text{W}$ power supply. Calculate the time taken to fully recharge the battery.