Okay I seem to got the first part
Torque on Wheel = Torque on coils in motor
TorqueWheel = ForceFriction*RadiusWheel
TorqueCoil = B*I*(AreaCoil)
Where I can solve for I or current. :)
But now i'm stuck on calculating the back emf...
I guess I know...
V(battery) - IR = emf or -L(dI/dt) =...
A small electric car overcomes a 269N friction force when traveling 28.6km/hr. The electric motor is powered by ten 12.0V batteries connected in series and is coupled directly to the wheels whose diameters are 50.6cm. The 295 armature coils are rectangular, 10.0cm by 14.8cm...
a)Calculate the work performed by an external agent to move a charge of -0.39x10^-12 C from `i' to `b'
Hint: The equipotential lines shown are separated by 1 kV. Work to move a charge is...
I need help with my homework.
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I don't how to figure this out because you only get velocity :/
The Attempt at a Solution