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Erika is on an elevator and presses the button to go down.
When the elevator first begins moving, it has an acceleration of 2.5 m/s2 downward.
Erika and the elevator have a combined mass of 1250 kg.
a) Draw a free-body diagram for the elevator.
b) What is the tension in the cable that provides the upward force on the elevator car?
Using a wheel and axle Use the pencil sharpener that you used in experiment A 8. Pull on the end of the string that held the books and observe how rapidly the crank turns.
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Measuring with a Micrometer Caliper A simple animation of using a micrometer to measure the width of a pencil.
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