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É Safari File Edit View History Bookmarks Window Help A R * E U.S. 64% (4)Fri Feb 23 8:13:25 AM QUE webassign.net O 2.5 kg block is dropped from rest from... 2.3 Kg Block Is Dropped From Rest Fro.. EP-HW11-Long Child whose Weight Is 350 NSwings... Child Whose Weight Is 350 NSwings... + J eBook 16 AM hot 50 AM 6. + 0/0.5 points | Previous Answers Tipler6 Z.P.044. My Notes + Ask Your Teacher A 2.5 kg block is dropped from rest from a height of 5.6 m above the top of the spring. When the block is momentarily at rest, the spring is compressed by 25.0 cm. What is the speed of the block when the compression of the spring is 15.0 cm? 3.78 X m/s hot 10 AM AM- Let the system include the block, the spring, and Earth. Let the gravitational potential energy be zero where the spring is compressed by the given distance. Then the mechanical energy at this compression distance will be partially kinetic and partially stored in the spring. You can use conservation of mechanical energy to relate the initial potential energy of the system to the energy stored in the spring and the kinetic energy of block when it has compressed the spring the given distance. eBook 16 AM 7. + 0.5/0.5 points | Previous Answers Tipler67.P.047. My Notes • Ask Your Teacher 99 ON C23 IL 10 AO 9Explanation / Answer
Case 1:
By Conservation of energy
mgh = (1/2)Kx2
2.5*9.81*5.6=(1/2)*K*0.252
K=4395 N/m
Case 2:
By Conservation of energy
mgh=(1/2)Kx2+(1/2)mV2
2.5*9.81*5.6=(1/2)*4395*0.152+(1/2)*2.5*V2
V=8.39 m/s =8.4 m/s
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