# Motion: Principles of Circular Motion

This is an MCQ-based quiz on the topic of Motion: Principles of Circular Motion.

This includes the following:-

• Force

• Retardation

• Velocity

• Angle

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Because of the conditions that give rise to them, tornadoes do not have the widespread destructive effects of hurricanes. Nevertheless, the winds encountered in some tornadoes are even greater than those at the eyewall of a hurricane. Suppose a small pebble is swept up in a tornado. The pebble is 3.81 m from the center of the tornado and has a tangential speed equal to that of the surrounding wind: 124 m/s. What is the magnitude of the centripetal acceleration of the pebble?

32.5

8.54

1059.2

4035.7

A model airplane with a mass of 3.2 kg moves in a circular path with a radius of 12 m. If the airplane's speed is 45 m/s, how large is the force that the control line exerts on the plane to keep it moving in a circle?

12

540

3.6

1728

A 45 kg child riding a Ferris wheel has a tangential speed of 8.5 m/s. Find the magnitude of the centripetal force on the child if the distance from the child to the axis of the wheel is 18 m.

180.6

8128

120

21.3

Deimos, a satellite of Mars, has an average radius of 6.3 km. If the gravitational force between Deimos and a 3.0 kg rock at its surface is 2.5 ´10-2 N, what is order of the mass of Deimos?

10^15

10^16

10^17

10^13

The most violent part of a hurricane is at the edge of the hurricane’s eye. This region, called the eyewall, can have winds with speeds of more than 300 km/h. Suppose winds in a hurricane’s eyewall have a tangential speed of 82.2 m/s. If the eyewall is 25 km from the center of the hurricane, what is the magnitude of the centripetal acceleration of particles in the eyewall?

0.27

270

0.003

3.3

At what minimum speed must a roller coaster be traveling so that the passengers upside down at the top of the circle do not fall out?  The radius of curvature of the roller coaster is 9.2m.

9.5

84.6

4.6

22.5

A 2kg ball rolls around the edge of a circle with a radius of 0.5m. If it is rolling at a speed of 8ms, what is the centripetal force?

8

128

98

256

A 2kg ball rolls around the edge of a circle with a radius of 1m. If it is rolling at a speed of 3ms, what is the centripetal acceleration?

1

3

9

0

A 1200kg car rounds a curve of radius 70m banked at an angle of 16degrees.  If the car is traveling at 90km/h, will friction force be required?  If so, in what direction?

Yes, down the slope

No

Yes, up the slope

Yes, vertical

In a rotating carnival ride, people rotate in a vertical cylindrical walled room.  During the ride, the floor drops out.  If the room radius is 5.8m, and the rotation frequency is 0.4revolutionspersecond when the floor drops out, what minimum coefficient of static friction keeps the people from slipping down?

0.45

0.27

0.52

0.31

Quiz/Test Summary
Title: Motion: Principles of Circular Motion
Questions: 10
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