1) U Elastic = 2) What is the total mechanical energy of the block when it is he

Question

1)

UElastic=

2)

       What is the total mechanical energy of the block when it is held in the stretched position?       

ME1=

3)

       What is the total mechanical energy of the block when it returns to its unstretched position?       

ME2=

4)

       When the spring again returns to its unstretched length, what is the speed of the block?       

v   0 =

5)

       What is the total mechanical energy of the block when it has returned only halfway      (20 cm) to its unstretched position?       

ME3=

6)

       When the spring has returned only halfway (20 cm), what is the  speed of the block?       

v   1/2 =

Explanation / Answer

1) U = 5 J

2) ME1 = 5 J

3) ME2 = 5 J

4) v = 1 m/s

5) ME3 = 1.25 J

6) v1/2 = 0.866 m/s

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