PHYS 2101 Chapter : Phys Problems
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Explain your answer. (a) wg = mg y = mgh = 3. 822 j, (b) wfa=+3. 822 j, (c) wfn =0 j, (d) =35. 78 , (e) , (f) wfk = h k(mg cos +fa cos( )) sin . = 4. 08 j, (f) no: (ch 7): a 1. 4 kg block is dropped from rest onto a vertical spring, with spring constant k = 600. 0 n/m, from 1. 20 m above the relaxed spring. Neglect any friction. (b) find the speed just before impact. (c) At what distance is the speed greatest (relative to the initial height)? (d) what is the angular frequency of the resulting simple harmonic oscillations? (a) x=0. 258 m, (b) v=4. 85 m/s, (c) x=1. 2 m+0. 023 m, (d) =20. 7 rad/s. Other topics: work represented graphically: (ch 8): a 2. 00 kg block is placed against a spring on a frictionless 30. 0 inline. The block is not attached to the spring.