Physics, 21.02.2020 20:49 cfnewton09
A rock with mass m = 4.00 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 16.3 N (a combination of gravity and the buoyant force exerted by the medium) and by a fluid resistance force f = kv, where v is the speed in m/s and k = 2.55 N×s/m .
1. Find the initial acceleration: a₀ = .
2. Find the acceleration when v = 2.10 m/s.
3. Find the speed when the acceleration equals 0.1*a₀.
4. Find the terminal speed .
5. Find the coordinate 2.00 s after the start of the motion.
6. Find the speed 2.00 s after the start of the motion.
7. Find the acceleration 2.00 s after the start of the motion.
8. Find the time required to reach a speed 0.9.
Answers: 2
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The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 − 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).
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A rock with mass m = 4.00 kg falls from rest in a viscous medium. The rock is acted on by a net cons...
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