xwilliams83
25.09.2020 •
Physics
The electric car in the above example had 300 J of chemical energy supplied by the battery. Of this, a total of 70.5 J was wasted as heat. What is the calculation of the overall efficiency of the electric car?
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Ответ:
Explanation:
potential energy =360800J
mass(m)=?
height (h)=25m
g=9.8m/s²
we have
potential energy =360800J
mgh=360800J
m×9.8×25=360800
m=360800/(9.8×25)=1472.653061kg