2015 #5 Free Response Question - AP Physics 1 - Exam Solution

The video tutorial covers question #5 from the 2015 AP Physics 1 exam, focusing on a setup involving a string, a frequency oscillator, and a block. It explains the concept of standing waves, the equation for wave velocity, and how different strings have different fundamental frequencies due to varying linear mass densities. The tutorial also discusses graphing frequency as a function of inverse linear mass density and analyzes the second harmonic of a string. The video concludes with a summary and additional resources for AP Physics 1 exam preparation.

What is the role of the frequency oscillator in the setup described?

• To measure the mass of the block

• To create a standing wave in the string

• To calculate the force of tension

• To determine the length of the string

Why do the four strings have different fundamental frequencies?

• They are made of different materials

• They have different linear mass densities

• They have different lengths

• They have different masses attached

What must be true for the velocity of a wave on a string to differ?

• The length of the string must be different

• The frequency of the oscillator must be the same

• The mass per unit length must be different

• The force of tension must be different

When graphing frequency as a function of the inverse of linear mass density, what is expected?

• A linear relationship

• An exponential relationship

• A quadratic relationship

• No relationship

What is the correct form of the equation to achieve a linear graph?

• Frequency on the Y-axis

• Frequency squared on the Y-axis

• Wavelength on the X-axis

• Force of tension on the X-axis

In the second harmonic, where are the points of greatest average vertical speed located?

• At the ends of the string

• At the midpoint of the string

• At the antinodes

• At the nodes

How many nodes and antinodes are present in the second harmonic?

• Two nodes and one antinode

• Three nodes and two antinodes

• Four nodes and three antinodes

• One node and two antinodes