Power

Step 1: Calculate power required to lift the lift
The force required to lift the lift is equal to its weight: The power required is given by: Step 2: Convert to horsepower
Since , the required horsepower is:

First, calculate the equivalent resistance of the parallel resistors: Now, the total resistance in the circuit is: Using Ohm’s law, the total current in the circuit is: Finally, the total power dissipated is: Thus, the correct power dissipated is .

First, calculate the equivalent resistance of the two resistors in parallel: Thus, Now, the total resistance in the circuit is: Now, use the formula for power: Substitute the values: Thus, the total power dissipated is 32.7 W.

The first step is to calculate the equivalent resistance of the parallel combination of the 4\Ω\ and 6\Ω\ resistors: Now, this equivalent resistance is in series with the 2Ω resistor. So the total resistance in the circuit is: Now, we can use Ohm's law to find the total current in the circuit: Finally, we can calculate the total power dissipated using the formula : Thus, the total power dissipated is 32.7 W.