Question : The motor pulls on the cable at A with a force F = a + bt^2....

Engineering Mechanics: Dynamics, Instructor-Solutions Manual [EXP-788]

The motor pulls on the cable at A with a force F = a + ${ bt }^{ 2 }$ . If the crate of weight W is originally at rest at t = 0, determine its speed at time t = ${ t }_{ 2 }$ . Neglect the mass of the cable and pulleys. Hint: First find the time needed to begin lifting the crate. Given: W = 17 lb , a = 30 lb , b = ${ 1 lb/s }^{ 2 }$ , ${ t }_{ 2 }$ = 4 s

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Question : The motor pulls on the cable at A with a force F = a + bt^2....

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