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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?

Velocity remains constant (A) Signup and view all the answers

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

Tangential to the circle at every point (D) Signup and view all the answers

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

Net force directed towards the center of the circle (A) Signup and view all the answers

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

It pulls objects inward towards the center of the circle (D) Signup and view all the answers

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

Outward centrifugal force (A) Signup and view all the answers

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

$a = v^2 / r$ (D) 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?

It moves in a straight-line path (B) Signup and view all the answers

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

1.05 m/s^2 (D) 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?

There would be no change in centripetal acceleration. (B) Signup and view all the answers

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

The centripetal force would quadruple. (B) 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?

The centripetal force would be greater than in the original scenario. (D) 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?

The centripetal force increases. (C) Signup and view all the answers

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