A 21-lb body is traveling in a horizontal straight line with a velocity of 19.8 ft/sec when a horizontal force P is applied to it at right angles to the initial direction of motion. If P varies according to the accompanying graph, remains constant in direction, and is the only force acting on the body in its plane of motion, find the magnitude of the velocity of the body when t = 2.4 sec and the angle which the velocity makes with the direction of P. P, lb 5.6 4 2.8 0 1.2 1.8 2.4 t, sec Answers: V= i i ft/sec 0

A 21-lb body is traveling in a horizontal straight line with a velocity of 19.8 ft/sec when a horizontal force P is applied to it at right angles to the initial direction of motion. If P varies according to the accompanying graph, remains constant in direction, and is the only force acting on the body in its plane of motion, find the magnitude of the velocity of the body when t = 2.4 sec and the angle which the velocity makes with the direction of P. P, lb 5.6 4 2.8 0 1.2 1.8 2.4 t, sec Answers: V= i i ft/sec 0

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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