Question

Multiple-Choice Questions; 100 points; 21 inutes If a multiple-choice question takes you longer than about 2-3 minutes, move on, do the other multiple-choice questions and the open-response questions, and come back to it later. Pacoe yourself. 1. In an engine, a piston oscillates with simple harmonic motion so that its position varies s in (in and t is n s. At according to the expression, y 3.00 cos(2.00t + π/6), where t 0, the velocity of the piston, in cm/s, is al (b) -3.00 (c) 3.00 (d) -6.00 (e) 6.00 2. A 2.00 kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 18.0 N is required to hold the object at rest when it is pulled 0.250 m from its equilibrium position. What is the angular frequency, in rad/s, of the oscillation? (a) 6.0 (b) 12.0 (c) 36.0 3. A 3.00 kg block connected to a spring with a force constant of 75.0 N/m oscillates with an amplitude of 0.200 mon a frictionless, horizontal surface. The speed, in m/s, of the block at the equilibrium position (a) 25.0 (b) 5.00 (c) 1.00 (d) 0.20 1. A simple pendulum of length 1 m oscillates with a certain period. Another simple pendulum has twice this period. Its length, in , is (b) 2 (d) 8 al (e) 16

Answer 1

dt k- 12 6.25 LJ 0.2で 2. l6 em