A pedal bicycle fitted with electrical motor the rider switch on the motor for 3.0 min.a constant current of 3.5A in the electrical motor is provided from baterry with a terminal voltage 24v.what is the energy supplied by the baterry?

1 Answer
Jun 27, 2018

15120 Joules


Energy = power x time
(Joules = Watts x seconds)

Power = voltage x current
(Watts = Volts x Amps)

First find the power:
#24V * 3.5A = 84W#

Multiply by time (must be in seconds):
#84W * (3*60)sec = 15120# Joules