2016 #1 Free Response Question - AP Physics 1 - Exam Solution

The video tutorial covers a problem from the 2016 AP Physics One exam, focusing on a wooden wheel rolling down a ramp. It explains how to draw a free body diagram, the forces involved, and the importance of these diagrams in grading. The tutorial also discusses angular velocity, torque, and derives an expression for linear acceleration. A comparison is made between a wheel and a block sliding down the ramp, highlighting differences in speed due to friction and energy conversion. Grading notes emphasize the need for clear explanations and full sentences.

What is the primary task described in the problem statement for the wooden wheel?

• Calculate the speed of the wheel.

• Find the angle of the ramp.

• Draw and label the forces acting on the wheel.

• Determine the mass of the wheel.

Which force acts at the center of mass of the wheel?

• Centripetal force

• Gravitational force

• Static friction

• Normal force

What is the direction of the static friction force on the wheel?

• Towards the center of the wheel

• Parallel and down the incline

• Parallel and up the incline

• Perpendicular to the ramp

Why is the free body diagram important in this problem?

• It shows the angle of the ramp.

• It determines the mass of the wheel.

• It is worth a significant portion of the problem's points.

• It helps calculate the speed of the wheel.

Which force is responsible for changing the angular velocity of the wheel?

• Centripetal force

• Gravitational force

• Normal force

• Static friction

What is the role of torque in the wheel's motion?

• It causes angular acceleration.

• It causes linear acceleration.

• It changes the wheel's mass.

• It affects the ramp's angle.

In the second experiment, which object reaches the bottom of the ramp first?

• Neither reaches the bottom

• Both reach at the same time

• The block of ice

• The wheel

Why does the block of ice have a greater speed at the bottom of the ramp?

• It experiences no rotational kinetic energy.

• It has more mass.

• It is affected by air resistance.

• It has a higher initial potential energy.

How is gravitational potential energy transformed as the objects move down the ramp?

• Into thermal energy

• Into sound energy

• Into kinetic energy

• Into potential energy

What must be included in your answer to receive full credit for Part C?

• A diagram

• A reference to the textbook

• A numerical calculation

• An explanation