# An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #7 V# and a current supply of #9 A#. How long will it take for the toy car to accelerate from rest to #3/2 m/s#?

##### 1 Answer

May 16, 2017

To accelerate the object from rest to 1.5

which is ,

now the electrical energy is equal to =

the electrical energy is equal to the mechanical work done , hence

so ,