Rotating Coin Paradox Explained

The rotating coin paradox involves two identical coins, where one rotates around the other. The common misconception is that the rotating coin turns once around its center. However, the animation reveals it actually rotates twice. This is explained by considering the path length the coin's center covers, which is twice its circumference, resolving the paradox.

What is the setup of the rotating coin paradox?

• Two coins rotating around each other.

• Two identical coins, one rotating around the other.

• One coin rotating around a stationary object.

• Two different coins, one rotating around the other.

What is the initial question posed in the rotating coin paradox?

• How far does the rotating coin travel?

• What is the size of the rotating coin?

• How many times does the rotating coin turn around its own center?

• How fast does the coin rotate?

What is the intuitive answer most people give to the paradox?

• The outer coin rotates once.

• The outer coin rotates three times.

• The outer coin does not rotate.

• The outer coin rotates twice.

Why do people think the rotating coin covers its circumference only once?

• Because the rotating coin is smaller.

• Because the rotating coin is larger.

• Because the coins are different sizes.

• Because the coins are the same size.

What does the animation reveal about the rotating coin?

• It rotates twice around its center.

• It does not rotate around its center.

• It rotates once around its center.

• It rotates three times around its center.

What is the key observation from the animation?

• The rotating coin moves faster than expected.

• The rotating coin rotates twice around its center.

• The rotating coin does not move.

• The rotating coin rotates once around its center.

Why can't points on the circumference of the coin move relative to its center?

• Because the coin is flexible.

• Because the coin is a solid.

• Because the coin is liquid.

• Because the coin is hollow.

What must be considered to understand the coin's rotation?

• The weight of the coin.

• The color of the coin.

• The path length the center covers.

• The material of the coin.

What do the two radii of the coins add up to?

• Half the radius of a single coin.

• Double the radius of a single coin.

• The same as the radius of a single coin.

• Triple the radius of a single coin.

What distance must the outer coin cover?

• Three times its circumference.

• The same as its circumference.

• Half its circumference.

• Twice its circumference.