3.4 Circular Motion

• Match the type of circular motion with its example:

  Uniform Circular Motion ↔️ Planets orbiting the sun at constant speed

  Non-Uniform Circular Motion ↔️ Roller coasters on a loop
• What are the two types of acceleration in non-uniform circular motion?

  Centripetal and tangential
• Why does an object accelerate in uniform circular motion despite constant speed?

  Direction changes
• Tangential acceleration in non-uniform circular motion changes the object's speed.


  True
• Match the variable in the centripetal acceleration formula with its description:

  $a_{c}$ ↔️ Centripetal acceleration

  $v$ ↔️ Speed of the object

  $r$ ↔️ Radius of the circular path
• The centripetal acceleration in circular motion is inversely proportional to the radius
• What does angular velocity measure in circular motion?

  Rate of change of angle
• What type of acceleration is present in uniform circular motion?

  Centripetal acceleration
• What is the role of centripetal force in circular motion?

  Maintains circular path
• What provides the centripetal force for planets orbiting the sun?

  Gravitational force
• Circular motion refers to the movement of an object along a circular path
• In non-uniform circular motion, both speed and direction change.


  True
• In uniform circular motion, the acceleration is called centripetal acceleration.
• Match the type of circular motion with its acceleration:

  Uniform Circular Motion ↔️ Centripetal acceleration

  Non-Uniform Circular Motion ↔️ Centripetal and tangential
• What is the direction of centripetal acceleration in uniform circular motion?

  Toward the center
• The formula for centripetal acceleration is $a_{c} =$$\frac{v^{2}}{r}$, where $v$ is the speed of the object.
• In uniform circular motion, the speed of the object remains constant.

  True
• In uniform circular motion, the centripetal acceleration is caused by a change in direction
• An example of uniform circular motion is a planet orbiting the sun
• Centripetal force is always directed towards the center
• Centripetal force changes the direction of the object's velocity
• What are the two main types of circular motion?

  Uniform and non-uniform
• What is constant in uniform circular motion?

  Speed
• How does the velocity change in uniform circular motion?

  Direction changes
• In circular motion, acceleration is always parallel to velocity.

  False
• In non-uniform circular motion, the object's speed varies along the circular path.
• What is the direction of centripetal force in circular motion?

  Toward the center
• What is centripetal acceleration directed towards in circular motion?

  The center of the circle
• What is the alternative formula for centripetal acceleration using angular velocity?

  $a_{c} =$$\omega^{2} r$
• Match the type of circular motion with its characteristics:

  Uniform circular motion ↔️ Constant speed, centripetal acceleration

  Non-uniform circular motion ↔️ Varying speed, centripetal and tangential accelerations
• Centripetal acceleration in uniform circular motion changes the object's speed.

  False
• Centripetal force is required for centripetal acceleration.

  True
• A Ferris wheel exhibits non-uniform circular motion.


  True