Physics, 17.03.2020 20:36 kpnclark3920
Dallas says that any change in velocity is directly proportional tothe time interval over which the change took place. Dana says thatis true only when the acceleration is constant. Which one, ifeither, is correct?
a. Dana, because it is true then the acceleration is constant
b. Dallas, because we can define ax, avg so thatDvx= ax, avgt.
c. Dallas, because ax, avg always is equalto
d. Allthe above are correct.
e. Only(a) and (b) above are correct
Answers: 2
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The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.
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Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these
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Abus travels 280km south along a straight path with an average velocity of 88km/h to the south. the bus stops for 24 min, then it travels 210 km south with an average velocity of 75 km/h to the south. how long does the total trip last?
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Dallas says that any change in velocity is directly proportional tothe time interval over which the...
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