Circular Motion | 115 plays

1.

Multiple Choice

2 mins

1 pt

Centripetal acceleration always points

in the direction of the object's motion

in the opposite direction of the object's motion

towards the center of the circle

towards the outside of the circle

2.

Multiple Choice

2 mins

1 pt

What is the difference between rotation and revolution?

Rotation is around another object while revolution is around its own axis.

Rotation is on its own axis while revolution is around another object.

They are the same

Rotation is faster

3.

Multiple Choice

30 sec

1 pt

What does RPM stand for?

Speed of a straight line

speed of a circle

Revolutions Per Minute

Rotations Per MInute

4.

Multiple Choice

2 mins

1 pt

The velocity is always _____ to the line of a circle.

outwards

towards the center

tangent

faster

5.

Multiple Choice

2 mins

1 pt

Period is measured in cycles per second

True

False

6.

Multiple Choice

1 min

1 pt

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

0.25 ms^-2

0.5 ms^-2

1 ms^-2

2 ms^-2

7.

Multiple Choice

30 sec

1 pt

A horse gallops around a circular arena. The centripetal force on the horse is ___.

directed outward

tension

directed toward the center of the arena

9.8 N

8.

Multiple Choice

30 sec

1 pt

Which of the following terms means "center seeking"?

centrifugal

centrifuge

centripetal

centenarian

9.

Multiple Choice

2 mins

1 pt

Centripetal acceleration always points:

in the direction of the object's motion

in the opposite direction of the object's motion

towards the center of the circle

towards the outside of the circle

10.

Multiple Choice

45 sec

1 pt

Which represents the acceleration of the ball?

A

B

C

D

11.

Multiple Choice

45 sec

1 pt

Which of the following depict the speed of the blowing ball?

A

B

C

D

12.

Multiple Choice

2 mins

1 pt

If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (Hint: C=2πr)

9.4 m/s

6.8 m/s

11.7 m/s

3.5 m/s

13.

Multiple Choice

2 mins

1 pt

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

2.4 m/s

3.6 m/s

3.9 m/s

4.2 m/s

14.

Multiple Choice

1 min

1 pt

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

10 N

20 N

30 N

40 N

15.

Multiple Choice

45 sec

1 pt

Assuming Andromeda rotates at a uniform rate, which stars are moving the fastest?

Stars closest to center

Stars furthest from the center

Stars with the hottest temperature

Stars with the coldest temperature

16.

Multiple Choice

1 min

1 pt

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

Friction

Centripetal Force

Gravity

Inertia

17.

Multiple Choice

45 sec

1 pt

Is it possible for an object moving with a constant speed to accelerate? Explain.
A) No, if the speed is constant then the acceleration is equal to zero. B) No, an object can accelerate only if there is a net force acting on it.
C) Yes, although the speed is constant, the direction of the velocity can be changing.
D) Yes, if an object is moving it can experience acceleration

A

B

C

D

18.

Multiple Choice

45 sec

1 pt

An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors.
A) Both vectors point in the same direction.
B) The vectors point in opposite directions.
C) The vectors are perpendicular.
D) The question is meaningless, since the acceleration is zero

A

B

C

D

19.

Multiple Choice

30 sec

1 pt

Which law determines the direction of an object's acceleration as it is moving in uniform circular motion?

Newton's First Law

Newton's Second Law

Newton's Third Law

The Universal Law of Gravitation

20.

Multiple Choice

30 sec

1 pt

The term centripetal means

circular motion

center accepting

center seeking

center fleeing

21.

Multiple Choice

30 sec

1 pt

Identify the force that determines the centripetal force as a car is turning a corner.

Friction Force

Tension Force

Normal Force

Centripetal Force

22.

Multiple Choice

30 sec

1 pt

Other than gravity what is the other force that is contributing to the net force of the coaster at the top of the loop?

Tension Force

Friction Force

Centripetal Force

Normal Force

23.

Math Response

2 mins

1 pt

A car is doing donuts in a parking lot. It completes 5 circles in 35 seconds. What is the period of rotation, in seconds?

Mathematical Equivalence

ON

24.

Math Response

2 mins

1 pt

A pig is flying in uniform circles with a period of 2 seconds. How many circles does the pig complete over ten seconds?

Mathematical Equivalence

ON

25.

Multiple Choice

30 sec

1 pt

Two riders sit at positions X and Y. Do they have different periods of rotation and why / why not?

No, because they have the same tangential velocity.

No, because they take the same amount of time to complete 1 loop.

Yes, because they have different tangential velocities.

Yes, because they have different masses probably.

26.

Multiple Choice

30 sec

1 pt

Two riders sit at positions X and Y. With every loop, do they travel the same distance?

Yes, since they are on the same ride

No, rider Y travels a greater circumference

27.

Multiple Choice

30 sec

1 pt

A runner is running around a circular track. The track has a diameter of 15 meters. How many meters, in total, does the runner run when it completes one loop?

Depends on how long it takes him to run the loop

47.12 meters

94.25 meters

176.71 meters

28.

Dropdown

1 min

1 pt

This car is (a) and also turning (b)

speeding up

slowing down

traveling at a constant velocity

right

left

29.

Multiple Choice

30 sec

1 pt

An object is traveling in a conical pendulum, as shown. What measurements would the student need in order to calculate the tangential velocity?

Radius only

Radius & period

Radius, period, and mass of the object

Radius, period, and length of the string

Answer explanation

v_T = 2πr / T

The students only need a measurement for the radius (r) and for the period (T).

30.

Multiple Choice

30 sec

1 pt

What force, or component of force, is equal to the net centripetal force?

The horizontal tension component

The vertical tension component

The force of gravity

The velocity force

31.

Multiple Choice

1 min

1 pt

What is the direction of the velocity at point B, if the ball is revolving clockwise?

up

right

down

left

32.

Multiple Choice

1 min

1 pt

A bicycle has a period of 0.3s . What is the

speed of its tires if their radius is 30 cm?

6 m/s

3 m/s

60 m/s

30 m/s

33.

Multiple Choice

45 sec

1 pt

Assuming Andromeda rotates at a uniform rate, which stars are moving the fastest?

Stars closest to center

Stars furthest from the center

Stars with the hottest temperature

Stars with the coldest temperature