# An electric toy car with a mass of #2 kg# is powered by a motor with a voltage of #4 V# and a current supply of #2 A#. How long will it take for the toy car to accelerate from rest to #3 m/s#?

##### 1 Answer

May 15, 2017

I tried this:

#### Explanation:

We can say that the power of the motor will be:

I would then use the theorem of Work

dividing both sides by the time we get:

because the toy car stars from rest (

so we get:

rerranging: