A loaded penguin sled with weight W rests on a plane inclined at angle to the horizontal (see figure). Between the sled and the plane, the coefficient of static friction is μs, and the coefficient of kinetic friction is μk. (Use any variable or symbol stated above as necessary.) e (a) What is the least magnitude of the force, F parallel to the plane, that will prevent the sled from slipping down the plane? mg sin (0) -μmg cos(0) F = mg × (b) What is the minimum magnitude F that will start the sled moving up the plane? F= mg sin (0) + cos(0) × (c) What value of F is required to move the sled up the plane at constant velocity? F= mg sin (0) +μ cos((0)) S

A loaded penguin sled with weight W rests on a plane inclined at angle to the horizontal (see figure). Between the sled and the plane, the coefficient of static friction is μs, and the coefficient of kinetic friction is μk. (Use any variable or symbol stated above as necessary.) e (a) What is the least magnitude of the force, F parallel to the plane, that will prevent the sled from slipping down the plane? mg sin (0) -μmg cos(0) F = mg × (b) What is the minimum magnitude F that will start the sled moving up the plane? F= mg sin (0) + cos(0) × (c) What value of F is required to move the sled up the plane at constant velocity? F= mg sin (0) +μ cos((0)) S

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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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
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