phsyics chap 11

A mass on a spring undergoes SHM. When the mass is at its maximum distance from the equilibrium position, which of the following statements about it are true? (There could be more than one correct choice.) A) Its acceleration is zero. B) Its speed is zero. C) Its elastic potential energy is zero. D) Its kinetic energy is a maximum. E) Its total mechanical energy is zero.

B) Its speed is zero.

If we double the frequency of a system undergoing simple harmonic motion, which of the following statement about that system is true? A) The angular frequency is reduced to one-half of what it was. B) The period is reduced to one-half of what it was. C) The period is doubled. D) The amplitude is doubled.

B) The period is reduced to one-half of what it was.

A tire sing hanging from a branch reaches nearly to the ground. How could you estimate the height of the branch using only a stopwatch?

Take the time it takes for the tire swing to complete one full swing as a pendulum. Measure the time it takes for the tire to sing back and forth over and over again and use the formula.

Real springs have mass. Will the true period and frequency be larger or smaller than given by the equations for a mass oscillating on the end of an idealized massless spring? Explain.

The true period and frequency of a mass spring system with a real spin will be a little bit bigger than those given y the idealized massless spring because the mass of the spring contributes to inertia.

A ball swinging at the end of a massless string, as shown in the figure, undergoes simple harmonic motion. At what point (or points) is the magnitude of the instantaneous acceleration of the ball the greatest? A) C B) A and D C) A and C D) A and B E) B

b. a and d

The figure shows a graph of the position x as a function of time t for a system undergoing simple harmonic motion. only look AT THE FIRST GRAPH ignore the others Which one of the following graphs represents the velocity of this system as a function of time?

b. graph that goes sloped then straight horizontal

Is the acceleration of a simple harmonic oscillator ever zero? If so where? Explain how acceleration changes with the displacement.

es, the acceleration of a simple harmonic oscillator is zero at the equilibrium point where the displacement is zero.

Identical balls oscillate with the same period T on Earth. Ball A is attached to an ideal spring and ball B swings back and forth to form a simple pendulum. These systems are now taken to the Moon, where g = 1.6 m/s2, and set into oscillation. Both systems will have the same period on the Moon as on Earth.

false

The frequency of the wave shown in the figure is 2.0 Hz

false

What is the frequency of the wave shown in the figure? A) 0.5 Hz. B) 1 Hz. C) 2 Hz. D) 4 Hz. E) It cannot be determined from the given information.

A) 0.5 Hz.

A ball swinging at the end of a massless string, as shown in the figure, undergoes simple harmonic motion. At what point (or points) is the magnitude of the instantaneous acceleration of the ball the greatest?

A and D it is the most outer parts

A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency? A) f B) 2f C) f/4 D) f/2 E) 4f

A) f

What is the wavelength of the wave shown in the figure?

It can not be determined form given information.

A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves upward with constant acceleration? A) The period becomes zero. B) The period increases if the upward acceleration is more than g/2 but decreases if the upward acceleration is less than g/2. C) The period decreases. D) The period increases. E) The period does not change.

C) The period decreases.

A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency? A) 2f B) 4f C) f D) f/2 E) f/4

C) f

A mass on a spring undergoes SHM. When the mass is at its maximum distance from the equilibrium position, which of the following statement about it is true? A) Its total mechanical energy is zero. B) Its acceleration is zero. C) Its kinetic energy is a maximum. D) Its elastic potential energy is zero. E) Its speed is zero.

E) Its speed is zero.

The total mechanical energy of a simple harmonic oscillating system is A) zero as it passes the equilibrium point. B) zero when it reaches the maximum displacement. C) a maximum when it passes through the equilibrium point. D) a minimum when it passes through the equilibrium point. E) a non-zero constant.

E) a non-zero constant.

if a pendulum clock is accurate at sea level, will it gain or lose time when taken to high altitude? Why?

It will gain time because acceleration is weaker at high altitudes because of gravity.

An inventor created two clocks using (a) simple pendulum (b) spring-mass system. He then plans to take this to the moon to measure the time. Which clock would provide the accurate timing? Explain.

The simple pendulum will be less affected by the gravity and the period will be longer. The spring-mass system will be affected by the mass and stiffness in the spring so the difference might not be as much like the pendulum clock.

The total mechanical energy of a simple harmonic oscillating system is a non-zero constant.

true