(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 9.00 x 10 kg hangs motionless on it. (Enter a number.) 8.82e-4 N (b) Calculate the tension (in N) in a horizontal strand of spiderweb if the same spider sits motionless in the middle of it much like the tightrope walker in the figure. 5.0° 5.0° T. TA w T. Ta The strand sags at an angle of 15.0° below the horizontal. (Enter a number.) |× N Compare this with the tension in the vertical strand (find their ratio). (Enter a number.) (tension in horizontal strand)/(tension in vertical strand) :

(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 9.00 x 10 kg hangs motionless on it. (Enter a number.) 8.82e-4 N (b) Calculate the tension (in N) in a horizontal strand of spiderweb if the same spider sits motionless in the middle of it much like the tightrope walker in the figure. 5.0° 5.0° T. TA w T. Ta The strand sags at an angle of 15.0° below the horizontal. (Enter a number.) |× N Compare this with the tension in the vertical strand (find their ratio). (Enter a number.) (tension in horizontal strand)/(tension in vertical strand) :

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 76PQ: Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to...

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Show that, as explained in the text, a force F⊥ exerted on a flexible medium at its center and perpendicular to its length (such as on the tightrope wire in Figure 5.26) gives rise to a tension of magnitude T = F⊥ /2sin(θ) .
The drawing below shows a person whose weight is W = 603 N doing push-ups. Assume L1 = 0.880 m and L2 = 0.435 m. Calculate the normal force exerted by the floor on each hand, assuming that the person holds this position.
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A hiker who has broken his forearm rigs a temporary sling using a cordstretching from his shoulder to his hand. The cord holds the forearmlevel and makes an angle of 40.0° with the horizontal where it attachesto the hand. Considering the forearm and hand to be uniform, with atotal mass of 1.30 kg and a length of 0.300 m, find (a) the tension inthe cord and (b) the horizontal and vertical components of the force, f>,exerted by the humerus (the bone of the upper arm) on the radius andulna (the bones of the forearm).
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A yo-yo-shaped devicemounted on a horizontal frictionlessaxis is used to lift a 30 kgbox . Theouter radius R of the device is0.50 m, and the radius r of thehub is 0.20 m. When a constanthorizontal force of magnitude140 N is applied to a ropewrapped around the outside ofthe device, the box, which is suspendedfrom a rope wrappedaround the hub, has an upwardacceleration of magnitude 0.80m/s2.What is the rotational inertiaof the device about its axis of rotation?
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Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to either side. As they lift and hold it up so that it is motionless, each handle makes a different angle with respect to the vertical side of the chest (Fig. P5.76). If the angle between Jamals handle and the vertical side is 25.0 and the angle between Dayos handle and the vertical side of the chest is 30.0, what are the tensions in each handle? FIGURE P5.76
Check your Understanding Explain which one of the following satisfies both equilibrium conditions: (a) a tennis ball that does not spin as it travels in the air, (b) a pelican that is gliding in the air at a constant velocity at one altitude; or (c) a crankshaft in the engine of a parked car.