A 0.650 kg block is attached to a spring with spring constant 13.0 N/m. While th
ID: 1560265 • Letter: A
Question
A 0.650 kg block is attached to a spring with spring constant 13.0 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 30.0 cm/s. What are You may want to review (pages 400 - 401). Here we learn how to calculate the amplitude of the spring's oscillations. Significant Figures Feedback: Your answer 6.7 cm was either rounded differently or used a different number of significant figure than required for this part. The block's speed at the point where x = 0.750 middot A? Express your answer with the appropriate units.Explanation / Answer
KE of the block at the beginning = KE at x = 0.75 + PE at x = 0.75
0.5mv^2 = 0.5*m*v1^2 + 0.5kx^2
0.5*0.65*0.3^2 = 0.5*0.65*v1^2 + 0.5*13*(0.75*0.067)^2
v1 = 0.198 m/s
= 19.8 cm/s
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