A motorist driving a 1467-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of5.00 s. Ignoring friction and air resistance, determine the average mechanical power in watts theengine must supply during this time interval. A car with mass of 1194 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ignore air resistance. The engine has a 22.0% efficiency, which means that 22.0% of the energy released by the burning gasoline is converted into mechanical energy.