Uniform Circular Motion: Crash Course Physics #7

What is uniform circular motion?

• Moving in a straight line at a steady speed.

• Moving in a consistent circular path.

• Moving randomly without a clear direction.

• Staying in one place without moving.

What is the name for the acceleration that pulls things inward when they move in a circle?

• Centrifugal acceleration

• Linear acceleration

• Centripetal acceleration

• Gravitational acceleration

How much acceleration can most people handle for about 10 minutes before they might black out?

• About 1 meter per second squared

• About 10 meters per second squared

• About 98 meters per second squared

• About 50 meters per second squared

If you spin a key on a string and then let go, what path will the key take right after you release it?

• It will continue to move in a circle.

• It will fly straight out in the direction it was going.

• It will fall straight down to the ground.

• It will fly backward towards you.

What do physicists call a force that seems to push you away from the center when you're spinning, but doesn't actually exist?

• A real force

• A gravitational force

• A fictitious force

• A magnetic force

What is the name for the amount of time it takes for something moving in a circle to return to its starting point?

• Frequency

• Speed

• Period

• Acceleration

If a spinning ride takes 2 seconds to make one full turn, what is its frequency?

• 2 Hz

• 0.5 Hz

• 1 Hz

• 4 Hz

Which formula correctly shows how to find the magnitude of centripetal acceleration?

• a = V / r

• a = V^2 * r

• a = V^2 / r

• a = r / V^2