A0.954-kg toy car is powered by three d cells (4.50 v total) connected directly to a small dc motor. the car has an effective energy conversion efficiency of 36.1%, meaning that 36.1% of the electric energy applied to the motor is converted into translational kinetic energy. after 7.88 seconds, the car, which is initially at rest, reaches a speed of 1.27 m/s. what is the average current supplied to the car\'s motor?

0.06 A

Explanation:

We have given mass =0.954 kg

velocity =1.27 m/sec

efficiency =0.361 the output kinetic energy of the motor

Efficiency =0.361

so input to the motor = output/efficiency

so input to the motor =

we know that where E is energy and T is time so

We know that power P=VI we have given V=4.5 VOLT

So current

the device is called “ rocket engine”

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015