An electric toy car with a mass of #6 kg# is powered by a motor with a voltage of #4 V# and a current supply of #7 A#. How long will it take for the toy car to accelerate from rest to #8/3 m/s#?
1 Answer
Jul 6, 2016
Explanation:
Since power given by the battery is
Now, we have to consider it's kinetic energy since that's what the question is about.
So, Kinetic energy equation is
Since all the work done by the battery is considered to be converted to kinetic energy,
We have
So substitute.
Rearranging gives us the answer as I have given above.
You can simplify it further yourself.