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A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. This causes the machine to slide 1.122 meters before coming to a rest.
a) What is the machine%u2019s initial velocity?
b) How long did it take to go the 1.122 meters?
c) What was the momentum of the machine?
d) What was the force necessary to move this machine?
e) What was its acceleration during this time?
f) What is the coefficient of kinetic friction?
g) What surfaces are likely to cause this friction?
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At one point in a pipeline, water's speed is 3.30 m/s and the gauge pressure is 4.00×10^4 Pa. Find out the gauge pressure at a second point in the line 13.0 m lower than the first if the pipe diameter at the second point is twice that at the first.
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