University action of the two B Dynamics sub-ted to the Aloaded truck weighs The

Question

University action of the two B Dynamics sub-ted to the Aloaded truck weighs The which has a mass of 100 kg of orate, 10 kg and the coefficient kinetic has a mass of contact us help urees partners privacy policy terms of opyrvt e 2011-2015 Saping Learning Inc.-104 MacBook Air nt k) has a length Lo when relaxed (4) A vertical spring (with spring cons pressed down with an Then a block m) is set on the spring, and (mass applied force Fo. compressing the spring to l 13 of its original length. (b) (a) What is the applied force Fo (expressed in terms of k, m, g, and Lo) (b) The block is released (Fo 0), and the spring projects the block upward. What is the maximum height above the floor reached by the block? K Lo

Explanation / Answer

Here ,

The compression , x = Lo - Lo/2

x = 2Lo/3

Now , balacing force in y -axis

kx = mg + Fo

k*2Lo/3 - mg = Fo

therefore , the applied force Fo is (k*2Lo/3 - mg)

B)

Here , Using conservation of energy ,

0.5 kx^2 = mgh

0.5 * k * (2Lo/3)^2 = mg*h

h = 2kLo^2/(9mg)

the maximum height is (2k*Lo^2/(9mg))

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