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Worksheetschp 10 circular motion quizizz review
Total questions: 36
Worksheet time: 21mins
When you ride a bicycle, the bike wheels rotate around their axles.
True
False
The terms linear speed and rotational speed can be used interchangeably.
True
False
All parts of a spinning merry-go-round have the same rotational speed.
True
False
The abbreviation RPM stands for revolutions per minute.
True
False
Tangential speed is directly proportional to rotational speed.
True
False
Your tangential speed while standing at the axis of rotation of a spinning platform is zero.
True
False
Any object moving in a circle is constantly accelerating.
True
False
In a washing machine’s spin cycle, water is forced away from the clothes.
True
False
The apparent outward force on a rotating or revolving body is centrifugal force.
True
False
When a can tied to a string is swung in a circle, an outwardly directed force acts on the can.
True
False
In a rotating reference frame, both centripetal and centrifugal force acts on objects in the rotating system.
True
False
The centrifugal force experienced in a rotational reference frame is not a true force.
True
False
The outside rim of a rotating turntable has a greater linear speed than parts closer to the axis.
True
False
Any force that causes an object to move in a circular path is called centripetal force.
True
False
A bug on a turntable will make more turns per minute if it is located nearer to the center of the record.
True
False
Circle the letter that best describes Earth’s motion around the sun.
Spin
Rotation
Revolution
Linear
Which letters are examples of rotation?
Ferris wheel in motion
Earth moving around the sun
both
none
Speed of something moving along a circular path
Linear speed
Rotational speed
Tangential speed
Average speed
Speed that involves the number of rotations per time.
Linear speed
Rotational speed
Tangential speed
Average speed
Circle the letter that describes the direction of motion associated with tangential speed.
Toward the center of motion
Outward from the center
Tangent to the circular path
Downward toward Earth
Circle the letter that results in an increase in a moving object's tangential speed.
Moving farther from the axis of rotation
Decreasing rotational speed
Decreasing the RPM
Moving closer to the axis of rotation
Circle the letter that identifies a factor that affects the amount of centripetal force acting on an object.
Tangential speed
Radius of curvature
Mass
All
Which has greater tangential speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail of a merry-go-round?
Inside horse
Outside Horse
Neither
Both have the same.
What is the direction of the force that acts on clothes in the spin cycle of a washing machine?
Inward
Downward
Outward
Up
A tin can whirled on the end of a string moves in a circle because _________.
the can continually pulls on the string
Once the can starts moving, that is its natural tendency
there is a force on the can pulling it outward
there is an inward force acting on the can.
If you whirl a tin can on the end of a string and the string suddenly breaks, the can will ___________.
fly off, tangent to its circular path.
fly directly toward you.
spiral in toward your hand.
spiral away from your hand.
A car travels in a circle with constant speed. The net force on the car ____.
is zero because the car is not accelerating.
is directed forward, in the direction of travel.
is directed toward the center of the curve.
none of the above
A communication satellite is in a circular orbit around Earth. If the speed of the satellite is constant, the force acting on the satellite_________.
is zero.
is decreasing.
points toward the center of the Earth at all times.
points in the direction that the satellite is moving.
A ladybug rests on the bottom of a tin can that is being whirled in a horizontal circle at the end of a string. What exerts the force that holds this ladybug in a circle?
Your hand
the string
the can
gravity
A centrifugal force is often called fictitious because ______.
There is no mass pulling outward
It is not part of the rotating system
It wasn’t recognized until after Newton’s time
It was once considered a force, but not at the present time
A 60 Kg ice skater moving at 5 m/s grabs a 6 m rope and is swept into a circular path. Find the tension in the rope. Use the equation Fc = mv²/r to solve the problem.
2.5 N
25 N
250 N
2500 N
From the equation Fc = mv²/r, calculate the tension in a 2 m length of string that whirls a 1 Kg mass at 2 m/s in a horizontal circle.
2 N
20 N
200 N
2000 N
Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?
Neither—they both have the same angular speed.
The inside horse
The outside horse
To get the distance travelled by a rotating wheel, the number of its revolution must be multiplied by its ________?
Radius
Diameter
Perimeter
Circumference
