1. A pendulum is pulled to the side and released. What is its frequency if it passes through its rest position 0.150 s after it is released?

2. A pendulum is swinging with a frequency of 6.24 Hz. What is the time required for the pendulum to move from its equilibrium position to its point of maximum displacement?

3. In an experiment to measure the frequency of a mass oscillating up and down on a spring, students observed that a mass passed through its equilibrium position 36 times in 6.5 s. What is the frequency of this harmonic oscillator?

4. What is the restoring force exerted by a spring with a spring constant of 6.25 x 104 N/m if it is compressed 9.50 cm from its rest position?

5. An object, resting on a horizontal frictionless surface, is attached to the end of a spring that has a spring constant of 1.25 x 103 N/m. The mass is pulled to a position that is 11.5 cm [S] of the spring's resting position, then released. If the magnitude of the acceleration is 14.8 m/s2 , what is the mass of the object?