Egyptian Pyramid Workers Push a 1200-Kg Block Up an Incline $\times$

question 60

Multiple Choice

Egyptian pyramid workers push a 1200-kg block up an incline that has an angle of 69 degrees to the vertical,at a constant speed of 0.5 m/s.The coefficient of kinetic friction between the block and the incline surface is 0.44.How much power must the workers supply?

• A)3.1 \(\times\) 10² W
• B)9.3 kW
• C)4.5 kW
• D)7.9 kW
• E)2.4 kW

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Definitions:

Tidal Volume

The volume of air that is inhaled or exhaled in a single breath during normal breathing.

Pleural Cavity

The slim space between the lungs and the chest wall, containing a small amount of lubricating fluid.

Pleural Membranes

Thin layers of tissue that line the thoracic cavity and envelope the lungs, aiding in respiration by facilitating lung expansion and contraction.

Bronchioles

Small airways in the lungs that branch off from the bronchi, leading air into the alveoli for gas exchange.