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A man stands on a scale inside an elevator at rest. The scale reads 800 N.
a. Determine what is the man mass?
b. The elevator accelerates upward momentarily at the rate of 2m/s^2. Find what does the scale read then?
c. The elevator then moves with a steady speed of 5m/s. find what does the scale read?
if the coefficients of static and kinetic friction between the 20kg block a and the 100kg cart b are both essentially
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On a cool morning, when the temperature is 15deg Celsius, you measure the pressure in your car tires to be 30 psi. After driving 20 mi on the freeway, temperature of your tires is 45 deg Celsius. What pressure will your tire gauge now show.
The work required to stretch a certain spring from anelongation of 4cm to 5cm is 30.5J. What is the work required to increase the elongation from 5cm to 6cm
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A 1.70mcylindrical rod of diameter 0.550cmis connected to a power supply that maintains a constant potential difference of 13.0Vacross its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0C) the amm..
Two racing boats set out from the same dock and speed away at thesame constant speed of 80.9 km/h for half an hour (0.500 h), theblue boat headed 29.2° south of west, and the green boat headed39.6° south of west.
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