- #1
IDK10
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Homework Statement
A motor lifts a block of mass 0.050kg at a constant velocity of 0.40m s-1. The current in the motor ia 85mA and the potential difference across it is 3.0V. Calculate the efficiency of the motor
Homework Equations
Ek = 1/2 x mv2
Electrical power = VIt
The Attempt at a Solution
Ig to the electrical power as 0.255W, and kinetic energy of the block as 0.004J. But how do I get the power of the block, or the electrical energy of the motor?