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Classical Mechanics

Circular Motion

Concept Quizzes

Uniform circular motion - Basic
Uniform circular motion - advanced

Challenge Quizzes

Circular Motion - Level 2 Challenges
Circular Motion - Level 4 Challenges

Uniform circular motion - Basic

A racing car moving at a constant tangential speed of $44 \text{ m/s}$ on a circular track takes one lap around the track in $45 \text{ seconds.}$ Determine the approximate magnitude of the acceleration of the car.

8.4

\text{ m/s}^2

7.7

\text{ m/s}^2

5.0

\text{ m/s}^2

6.0

\text{ m/s}^2

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A $11 \text{ kg}$ rock swings in a circle of radius $10 \text{ m}$ at a constant speed of $7 \text{ m/s}.$ What is the centripetal acceleration?

4.9

\text{ m/s}^2

7.35

\text{ m/s}^2

2.45

\text{ m/s}^2

9.8

\text{ m/s}^2

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A $5 \text{ kg}$ rock swings in a vertical circle of radius $2 \text{ m}.$ The speed of the rock as it passes its lowest point is $10 \text{ m/s}.$ What is the tension $T$ acting on the rock as it passes its lowest point?

The gravitational acceleration is $g= 10 \text{ m/s}^2.$

315 \text{ N}

300 \text{ N}

305 \text{ N}

295 \text{ N}

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An object that moves in uniform circular motion has a centripetal acceleration of $11 \text{ m/s}^2.$ If the radius of the motion is $0.02 \text{ m},$ what is the approximate frequency of the motion?

-7.25

\text{ Hz}

-4.25

\text{ Hz}

0.75

\text{ Hz}

3.75

\text{ Hz}

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A skater is skating at $14 \text{ m/s}$ on a circle of radius $4 \text{ m}.$ The ice exerts a central force of $2058 \text{ N}$ on the skater. What is the mass of the skater?

37 \text{ kg}

55 \text{ kg}

34 \text{ kg}

42 \text{ kg}

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by Brilliant Staff