Uniform Circular Motion
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Questions and Answers

What is uniform circular motion?

  • When an object moves in a circular path with a constant speed (correct)
  • When an object moves in a straight path at varying speeds
  • When an object moves in a straight path with a constant speed
  • When an object moves in a circular path with a varying speed

    • In uniform circular motion, what is the difference between a scalar and vector quantity?

  • Scalar quantities and vector quantities are the same in uniform circular motion
  • Scalar quantities require only direction, while vector quantities require magnitude and direction
  • Scalar quantities require both magnitude and direction, while vector quantities require only magnitude
  • Scalar quantities are described with only magnitude, while vector quantities need both magnitude and direction (correct)

    • Why does velocity change in uniform circular motion even if the speed is constant?

  • Due to changes in the object's speed
  • Due to changes in the object's mass
  • Due to changes in the object's direction (correct)
  • Due to changes in the object's volume

    • What happens to an object's velocity in uniform circular motion according to Newton's first law of motion?

    <p>Velocity remains constant</p> Signup and view all the answers

    How would you describe the direction of velocity in uniform circular motion?

    <p>Tangential to the circle at every point</p> Signup and view all the answers

    What is the primary reason why an object in circular motion does not follow a straight-line path?

    <p>Net force directed towards the center of the circle</p> Signup and view all the answers

    What is the role of centripetal force in maintaining circular motion?

    <p>It pulls objects inward towards the center of the circle</p> Signup and view all the answers

    What is the apparent outward-directed force felt by something moving in a circle due to inertia called?

    <p>Outward centrifugal force</p> Signup and view all the answers

    Which equation is used to calculate the inward acceleration of an object in circular motion?

    <p>$a = v^2 / r$</p> Signup and view all the answers

    What happens to a toy airplane's motion if the child spinning it lets go of the string providing centripetal force?

    <p>It moves in a straight-line path</p> Signup and view all the answers

    What is the centripetal acceleration of the child on the bike?

    <p>1.05 m/s^2</p> Signup and view all the answers

    If the child's mass was given in grams instead of kilograms, how would this conversion affect the centripetal acceleration?

    <p>There would be no change in centripetal acceleration.</p> Signup and view all the answers

    What would happen to the centripetal force experienced by the child if the velocity is doubled?

    <p>The centripetal force would quadruple.</p> Signup and view all the answers

    If a child with a mass of 40kg rides a bike at the same speed in a circle with a radius of 4m, how would the centripetal force compare to the original scenario?

    <p>The centripetal force would be greater than in the original scenario.</p> Signup and view all the answers

    What happens to the centripetal force if the radius of the circular path is increased while keeping all other factors constant?

    <p>The centripetal force increases.</p> Signup and view all the answers

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