Physics, 30.10.2019 06:31, marelinatalia2000
You and your friend peter are putting new shingles on a roof pitched at 20°. you're sitting on the very top of the roof when peter, who is on the edge of the roof, 5.1 m away, asks you for the box of nails. rather than carry the 2.2 kg box of nails down to peter, you decide to give the box a push and have it slide down to him.
if the coefficient of kinetic friction between the box and the roof is 0.53, with what speed should you push the box to have it gently come to rest right at the edge of the roof?
Answers: 3
Physics, 22.06.2019 13:10, kelonmazon2492
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.
Answers: 3
Physics, 22.06.2019 19:10, summer132
Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to
Answers: 3
You and your friend peter are putting new shingles on a roof pitched at 20°. you're sitting on the v...
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