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Physics CIE help

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nid404:
ohk...E=qv  I'll tell u the derivation

energy= force X displacement right?

E=Voltage / distance & also E= Force/charge (E=Electric field strength)  [i hope ur aware of this one]

so Voltage / distance= Force/charge
   Force= Voltage X Charge / distance
   Energy= Force X displacement
            = Vq/ d  X d
             = Vq

Got it?

tmisterr:
A cyclist is capable of an average output power of 3kw during a 4km speed trial. his aero dynamic suit and position reduce resistance forces to 180 newton. what is the approx time achieved in this time trial? been bugging me for 20 min

student:
P=W/T
T=W/P
W=F*d
T=F*d/P
T=180*4000/3000=240s

nid404:
thanks student

tmisterr:
Ah thanks student! i was going to outerspace wit my solution

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