M R F Suppose you are hanging out in your childhood tree house, which has a trapdoor with a weight on top of it. Your friend climbs up to the tree house and exerts a force F directly upwards at a distance R from the pivot. What is the closest distance from the pivot that you can place a weight of mass M to keep your friend out of the tree house?

M R F Suppose you are hanging out in your childhood tree house, which has a trapdoor with a weight on top of it. Your friend climbs up to the tree house and exerts a force F directly upwards at a distance R from the pivot. What is the closest distance from the pivot that you can place a weight of mass M to keep your friend out of the tree house?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 70P: Part of riding a bicycle involves leaning at the correct angle when making a turn, as seen below. To...

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A 50N body is supported by two ropes, one making 30* with the vertical and the other making 45* with the horizontal. What is the tension in the ropes?
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Part of riding a bicycle involves leaning at the correct angle when making a turn, as seen below. To be stable, the force exerted by the ground must be on a line going through the center of gravity. The force on the bicycle wheel can be resolved into two perpendicular components—friction parallel to the road (this must supply the centripetal force) and the vertical normal force (which must equal the system’s weight). (a) Show that (as defined as shown) is related to the speed vand radius of curvature rof the turn in the same way as for an ideally banked roadway—that is, =tan1(v2/rg) . (b) Calculate for a 12.0-m/s turn of radius 30.0 m (as in a race).
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Apainter stands on a horizontal uniform scaffold hung by its ends from two vertical ropes A and B, 6m apart. The scaffold weighs 200N. The tension in A is 750 N and that in B is 250 N. a. What is the weight of the painter? b. How far from A is he standing?