(2 of 2) Measuring the Rotational Inertia of a Bike Wheel

The video tutorial revisits the concept of rotational inertia, focusing on a bicycle wheel. It discusses the calculation of rotational inertia, considering the wheel's mass and radius, and explores the reasonableness of the measured value. The tutorial also delves into torque summation and the challenges of summing torques on different components. Finally, it calculates the force of tension in the string while the wheel is accelerating, comparing theoretical predictions with actual measurements.

What was the determined rotational inertia of the bicycle wheel?

• 0.177 kg m²

• 0.167 kg m²

• 0.157 kg m²

• 0.147 kg m²

Which fraction is used to estimate the rotational inertia of a thin hoop?

• 1/3

• 3/4

• 1/2

• 1

What is the estimated fraction used for the bicycle wheel's rotational inertia?

• 2/3

• 3/4

• 4/5

• 1/2

Why can't the torques caused by tension be assumed to cancel each other out?

• The forces are not equal

• The r vector for the torque is not defined

• The wheel is not rotating

• The mass is too small

What is the calculated force of tension in the string while the wheel is accelerating?

• 1.84 N

• 2.04 N

• 1.74 N

• 1.94 N

What is the significance of the force sensor reading before the wheel is released?

• It shows the wheel's mass

• It measures the force of gravity

• It measures the wheel's speed

• It indicates the force of tension equals the force of gravity

What is the predicted force differential between rest and acceleration?

• 0.3 N

• 0.4 N

• 0.2 N

• 0.1 N