# An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #3 V# and a current supply of #8 A#. How long will it take for the toy car to accelerate from rest to #3 m/s#?

##### 1 Answer

Sep 6, 2016

It will take

#### Explanation:

To accelerate the car to

Now to find the time we have to calculate the engine's power:

Finally to calculate the time we have to divide the work/energy by the power: