322_Dynamics 11ed Manual

322_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 15 Given: M 7Mg = t 1 2s = v 40 km hr = t 2 5s = F 1 5kN = t = F 2 15 kN = Solution: The impulse exerted on the plane is equal to the area under the graph. Mv 1 2 F 1 t 1 + 1 2 F 1 F 2 + () t 2 t 1 + 1 = v 1 v 1 2 M F 1 t 1 F 1 F 2 + t 2 t 1 + + = v 1 16.11 m s = Problem 15-30 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
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