Question 1

A stone is dropped into a calm lake, creating ripples that spread outward. Which statement best describes the motion of the water particles as the wave propagates?

Accepted Answer

The water particles move in circular paths, transporting energy but not mass across the lake.

Question 2

In the context of a rope being shaken up and down to create a wave, as shown in the image, what is the relationship between the velocity of the rope particle and the velocity of the wave?

Accepted Answer

The velocity of the rope particle is perpendicular to the velocity of the wave.

Question 3

Which of the following best describes the difference between transverse and longitudinal waves, as illustrated in the images?

Accepted Answer

Transverse waves have oscillations perpendicular to the direction of wave motion, while longitudinal waves have oscillations parallel.

Question 4

A sound wave is produced by a drum. Which type of wave is this, and what is the primary motion of the particles in the medium?

Accepted Answer

Longitudinal wave; particles move parallel to the direction of wave propagation.

Question 5

In the context of surface waves on water, what is the motion of the water particles beneath the surface?

Accepted Answer

They move in circular paths, decreasing in size with depth.

Question 6

The intensity $$I of a $$spherical wave decreases with distance from the source according to which relationship?

Accepted Answer

$$I \propto \frac{1}{r^2$}$$

Question 7

A wave encounters a boundary between a light and heavy section of rope. What happens to the pulse, as shown in the image?

Accepted Answer

The pulse is partly transmitted and partly reflected, with the reflected pulse inverted.

Question 8

Which equation correctly expresses the intensity $$I of a $$wave in terms of amplitude $$A$$, frequency $$f$$, density $$\rho$$, and velocity $$v$$?

Accepted Answer

$$I = 2\pi^2$ \rho v f^2$ A^2$

Question 9

Which statement best describes the law of reflection for waves?

Accepted Answer

The angle of incidence equals the angle of reflection.

Question 10

When two waves pass through the same region of space, what principle determines the resulting displacement?

Accepted Answer

The displacement is the arithmetic sum of the individual displacements.

Question 11

A mass attached to a spring oscillates with period $$T. $$Which equation gives the period in terms of mass $$m$$ and spring constant $$k$$?

Accepted Answer

$$T = 2\pi \sqrt{\frac{m}{k}}$$

Question 12

For a simple pendulum of length $$\ell$$ and small amplitude, which equation gives the period $$T$$?

Accepted Answer

$$T = 2\pi \sqrt{\frac{\ell}{g}}$$

Question 13

Which of the following is true about standing waves on a string with both ends fixed?

Accepted Answer

Nodes occur where there is no motion; antinodes occur where the amplitude is maximum.

Question 14

A car rounds a banked curve with no friction required. Which equation relates the normal force $$F_N$$, banking angle $$	heta$$, mass $$m$$, speed $$v$$, and radius $$r$$?

Accepted Answer

$$F_N \sin 	heta = m \frac{v^2$}{r}$$

Question 15

Which of the following best describes resonance in a forced oscillation system?

Accepted Answer

Resonance occurs when the driving frequency matches the natural frequency, resulting in large amplitude.

Question 16

A wave travels from air into water. What happens to its speed and wavelength?

Accepted Answer

Speed decreases and wavelength becomes shorter.

Question 17

Which real-world scenario is an example of constructive interference?

Accepted Answer

Two speakers emitting sound waves in phase, resulting in louder sound at certain locations.

Question 18

Which property of a wave determines the energy transported by the wave?

Accepted Answer

The energy transported is proportional to the square of the amplitude.

Question 19

A satellite in orbit around Earth experiences 'weightlessness.' What is the physical explanation for this phenomenon?

Accepted Answer

The satellite and its contents are in free fall, so there is no normal force.

Oscillations and Waves: Study Notes for College Physics

Guida di studio - Domande di pratica

Study guide - Flashcard