An electric toy car with a mass of #3 kg# is powered by a motor with a voltage of #8 V# and a current supply of #3 A#. How long will it take for the toy car to accelerate from rest to #4 m/s#?
2 Answers
Feb 22, 2017
The time is 1 second.
Explanation:
Given:
Let t = the time of acceleration.
Let
The energy provided by the motor is:
The kinetic energy of the vehicle:
The following step assumes no loss in the system:
Feb 22, 2017