Efficiency of a 265W Motor at 4.30A from 120V Line | Energy Usage in 1.50 Hours

[aMo0oDi]

What is the efficiency of a 265W motor that draws 4.30A from 120V line?
How much energy in Joules does this motor use in 1.50 hour?

thanks in advance..

 

[zwtipp05]

What have you tried? Do you know what power is?

 

[aMo0oDi]

power has two equations :
1) P(t)= W/t = -PE/t = q.V/t = I.V
2) P= I (I.R)

 

[zwtipp05]

power has two equations :
1) P(t)= W/t = -PE/t = q.V/t = I.V
2) P= I (I.R)

Power can also be expressed as P=V^2/R

Now what is efficiency defined as?

Finally, what information are you given and what can you do with it?

 

[Mk]

power has two equations :
1) P(t)= W/t = -PE/t = q.V/t = I.V
2) P= I (I.R)

If W/t=IV
W=J/s
I=Amps
V=Volts

You just plug it in, then find the efficiency.