a famous motorcycle company has just built its first electric model. like all vehicles, the purpose of the…

a famous motorcycle company has just built its first electric model. like all vehicles, the purpose of the motorcycle is to put out kinetic energy. how much energy goes toward kinetic energy? 50 j 200 j 400 j 800 j electric energy 800 j kinetic energy? j heat 200 j friction 200 j

a famous motorcycle company has just built its first electric model. like all vehicles, the purpose of the motorcycle is to put out kinetic energy. how much energy goes toward kinetic energy? 50 j 200 j 400 j 800 j electric energy 800 j kinetic energy? j heat 200 j friction 200 j

Answer

Explanation:

Step1: Apply energy - conservation principle

The total input electric energy is converted into kinetic energy and energy lost to friction and heat. Let the electric energy be $E_{e}=800\ J$, the energy lost to friction be $E_{f}=200\ J$ and the energy lost as heat be $E_{h}=200\ J$, and the kinetic energy be $E_{k}$. According to the law of conservation of energy $E_{e}=E_{k}+E_{f}+E_{h}$.

Step2: Solve for kinetic energy

We can re - arrange the formula to find $E_{k}=E_{e}-E_{f}-E_{h}$. Substitute $E_{e}=800\ J$, $E_{f}=200\ J$ and $E_{h}=200\ J$ into the formula. So $E_{k}=800 - 200-200=400\ J$.

Answer:

400 J