The 40-lb block is moving downward with a speed of 3 ft/s at t = 0 when

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The 40-lb block is moving downward with a speed of 3 ft/s at t = 0 when constant forces P and 2P are applied through the ropes. Knowing that the block is moving upward with a speed of 2 ft/s when t = 4 s, determine

(a) The magnitude of P,

(b) The time at which the speed is zero. Neglect the effect of friction and the masses of the pulleys.

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Vector Mechanics for Engineers Statics and Dynamics

ISBN: 978-0073212227

8th Edition

Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell

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Question Posted: Oct 19, 2010 02:36 AM

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The 40-lb block is moving downward with a speed of 3 ft/s at t = 0 when

Question:

40 lb 2P

Step by Step Answer:

2P P 2P 4016 a b 1 F dt m ...View the full answer

Vector Mechanics for Engineers Statics and Dynamics

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