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19 October, 10:41

Solve problem. Be sure to show your work and give a final answer with units rounded to the correct number of significant figures.

1) A wagon with a weight of 136 N is moved 19 m from its original location. How much work was done?

2) A simple machine requires 8.3 N of force to obtain an output force of 32 N. What is the mechanical advantage of the machine?

3) If an electrical appliance has 150.0 V applied causing a current of 2.34 amps, what is the resistance of the appliance?

4) What is the electrical power generated from a voltage of 12.3 V if the current is 9.42 amps?

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  1. 19 October, 10:57
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    Question1=2584Joules

    Question2=3.9 approximately

    Question3=64.1ohms approximately

    Question4=115.866watts

    Explanation:

    Question1:

    Weight=136N

    Distance=19m

    Work=weight x distance

    Work=136 x 19

    Work=2584J

    Question2:

    Load=32N

    Effort=8.3N

    Mechanical advantage=load ➗ effort

    Mechanical advantage=32 ➗ 8.3

    Mechanical advantage=3.9 approximately

    Question3:

    Voltage=150volts

    Current=2.34amps

    Resistance=voltage ➗ current

    Resistance=150 ➗ 2.34

    Resistance=64.1ohms approximately

    Question4:

    Voltage=12.3v

    Current=9.42 amps

    Power = current x voltage

    Power=9.42 x 12.3

    Power=115.866 watts
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