Physics, 10.12.2019 13:31, xuzixin2004
You drop a single coffee filter of mass 1.5 grams from a very tall building, and it takes 49 seconds to reach the ground. in a small fraction of that time the coffee filter reached terminal speed. (a) what was the upward force of the air resistance while the coffee filter was falling at terminal speed? fair = 0.0147 n (b) next you drop a stack of 3 of these coffee filters. what was the upward force of the air resistance while this stack of coffee filter was falling at terminal speed? fair = 0.0441 n (c) again assuming again that the stack reaches terminal speed very quickly, about how long will the stack of coffee filters take to hit the ground? (hint: consider the relation between speed and the force of air resistance.) fall time is approximately 28.3 s additional materials section 7.10 practice another version home my assignments extension request copyright © 2019 cengage learning, inc. all rights reserved
Answers: 2
Physics, 22.06.2019 05:00, bbygrl70
Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?
Answers: 1
Physics, 22.06.2019 09:40, wi8wuwj283jendjdudjd
When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.
Answers: 1
You drop a single coffee filter of mass 1.5 grams from a very tall building, and it takes 49 seconds...
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