Excel in math and science.

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

Your answer seems reasonable. Find out if you're right!

That seems reasonable. Find out if you're right!

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

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

5.0

\text{ m/s}^2

6.0

\text{ m/s}^2

7.7

\text{ m/s}^2

Show explanation

View wiki

by Brilliant Staff

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?

7.35

\text{ m/s}^2

9.8

\text{ m/s}^2

2.45

\text{ m/s}^2

4.9

\text{ m/s}^2

Show explanation

View wiki

by Brilliant Staff

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 $g= 10 \text{ m/s}^2.$

300 \text{ N}

315 \text{ N}

305 \text{ N}

295 \text{ N}

Show explanation

View wiki

by Brilliant Staff

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}

Show explanation

View wiki

by Brilliant Staff

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}

42 \text{ kg}

34 \text{ kg}

55 \text{ kg}

Show explanation

View wiki

by Brilliant Staff