Question

7.18 do include A: You must put the proper sign for per energy equation or course, whether or no ular position depends on where you choose y affect your final answer I diguish between a spring Mr. Dunn Name Fall 2019 Physics 201 Test - Energy & Momentum Figure 7.7 0.68m 5.00 kg 5.00 m/s 2) In Figure 7.7, a 5.00-kg block is moving at 5.00 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. What is the speed of the block when the spring is compressed to only one-half of the maximum distance? Hi-Euw, 2 =1215/5) = 62.55 يا ( Vi = 2 (0.668)

Answer 1

5 kep From energy conservation, 2 ak = 270. 3287 197 N/m Let speed be re, * w** sk(05%) = f my? - mu? = m2 (068) ? a mrl2 = 5 x 52 - - 270. 3287197 * (0.34)2 283 – 31.25 12 - 93.75 93.75 =18.75 .:N = 4.330 127 m/s.