Physics, 23.04.2021 16:30 Tyrant4life
This problem is likely the most difficult problem of the exam. Give yourself time to consider thoughtfully,
Wheels falling off moving vehicles are rare but documented and dangerous occurences.
The wheel continues to roll, reeking havoc in its path. Assume a 45 kg wheel with radius of 30 cm fell off a truck on top of a 6-m tall hill. The truck was already traveling at 20 m/s when it lost the wheel. Assume the moment of inertia of the wheel is 1 - MR. Determine the linear speed of the wheel when it reaches the bottom of the hill. m/s
Hints:
1) There are linear and rotational Ke terms both before and after rolling down the hill.
2) Use the linear equivalent of angular velocity to simplify rotational terms.
3) Don't plug in numbers until the very end of your work.
Answers: 3
Physics, 22.06.2019 12:10
Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f
Answers: 2
Physics, 22.06.2019 16:00
At what time will the interfering waves have an amplitudeof zero?
Answers: 1
Physics, 22.06.2019 16:30
A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.
Answers: 2
This problem is likely the most difficult problem of the exam. Give yourself time to consider though...
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