2017 #5 Free Response Question - AP Physics 1 - Exam Solution

The video tutorial covers question #5 from the 2017 AP Physics One exam, focusing on wave pulses traveling in opposite directions on a string. Part A involves plotting the velocity of a point on the string over time, while Part B requires sketching the string's shape when pulses overlap. The tutorial emphasizes the importance of accurate drawings for grading, with no need for equations or explanations. The video concludes with a reminder to draw horizontal lines at zero when necessary.

What is the initial velocity of the point P on the string before the left-hand pulse reaches it?

• -1 unit per second

• 2 units per second

• 0 units per second

• 1 unit per second

During which time interval does the point P on the string have a velocity of 1 cm/s?

• 0 to 1 seconds

• 1 to 3 seconds

• 4 to 5 seconds

• 3 to 4 seconds

What is the velocity of point P on the string from t = 3 to 4 seconds?

• 0 cm/s

• 1 cm/s

• -2 cm/s

• 2 cm/s

At t = 5 seconds, what is the amplitude of the resultant wave in sections A and E?

• 3 centimeters

• 1 centimeter

• 0 centimeters

• -3 centimeters

In section C, what is the amplitude of the resultant wave at the end of the section?

• 1 centimeter

• 3 centimeters

• -3 centimeters

• 0 centimeters

What is the shape of the resultant wave in section D?

• Linear line from 0 to -3 centimeters

• Curved line

• Linear line from -3 to 0 centimeters

• Horizontal line

What is emphasized as crucial for earning points in the problem's grading?

• Detailed explanations

• Verbal descriptions

• Accurate drawings

• Use of equations