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This is a great example of where physics and our gut feelings about physics don't match up. This is a very common conceptional difficulty students have and is often jumped on by examiners. The best way to...
a) Use the equation P=IV where P is power in W, I is Current in Amps and V is voltage in volts. Rearrange to give I=P/V I=1000/230 = 4.34 A b) This is a wire connected to the metal casing of an electrical...
The questions is constructed to show, that the order of devices do not affect the currents or voltages.
5ohm / ( 3 + 5)ohm = x/ 2V +5V x = 35/8 V = 4 3/8V
spreading out
a) a=v-u/t
= 33/1 = 3
b) F = ma
= 950x3 = 2850
c) Friction and air resistance increases with speed, till frictional = max forward force, then force/acceleration is zero
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