PCS 125 Midterm: PCS125 W2008 Midterm
Document Summary
A particle is in simple harmonic motion of amplitude a and total energy e. at one instant its kinetic energy is 3e/4. Its displacement at that instant is (a) a/ 2 (b) a/2 (c) a/ (3/2) (d) a/ 3 (e) a. A 1-kg object attached to a spring with force constant 25. 0 n/m oscillates on a. A 1-kg object attached to a spring with force constant 25. 0 n/m oscillates on a horizontal frictionless surface. At time t = 0 the object is released from rest at x = +3. 0 cm (that is the spring is stretched by 3. 0 cm). A wave traveling on a string is described by the expression y = 0. 005 sin(20x - t) , where y is in meters, and x and t are in meters and seconds, respectively. Transverse waves with a speed of 5. 4 m/s are to be produced in a taut string. 5. 00-m long string with a mass of 375 g is used.
