17 Answered Questions for the topic Circular Motion

#### Calculate the speed of light in glycerine and in diamond

Question:-The refractive indices of glycerine and diamond with respect to air are 1.4 and 2.4 respectively. Calculate the speed of light in glycerine and in diamond. From these results find...
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06/11/18

#### Electrostatics + Circular Motion

In a helium atom, two electrons orbit the nucleus that consists of 2 protons and 2 neutrons. If the atomic radius of helium is 3.1x10^-11 m, what is the average kinetic energy of the electrons?...
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05/07/18

#### How can you determine if something is in stable orbit

A space probe has a period of 100 minutes around the earth at an altitude of 83 km about the earth's surface?
Can we tell if a stable orbit is present?

04/10/18

#### How to calculate g-force?

A 35,000 kg plane travelling 120 m/s turns in a full circle, the period being 12 s. If the plane maintains constant altitude and velocity, what is the g-force on the pilot?

04/06/18

#### Ball hanging from string (centripetal forces) #1

A ball, attached to a string, moves in a circle. How does the tension of the string change if the speed of the ball is doubled?

03/24/18

#### Minimum coefficient of static friction

An amusement park ride consists of a vertical cylinder that rotates about its axis. The radius of the cylinder is 2.5m and rotates at a constant speed of 15 m/s. What is the minimum coefficient of...
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#### Circular Motion: Finding the angle from the vertical

A .25 kg object is attached to a 0.80m string. The object is pulled to a point so that the string makes an angle θ from the vertical. It is then released. At the bottom of the object's path, the...
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03/23/18

#### Help needed on finding speed for circular motion

A radio controlled ariplane is suspended from a 0.80 m string. The plane revolves in a circle at a constant speed. The angle the string makes from the vertical is 60º. What is the speed of the...
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#### Circular motion: finding the centripetal acceleration without mass, velocity, or tension given

I can't seem to solve this question... A ball is swung in a horizontal circle so that the string makes a 26º with the pole it is attached to. What is the centripetal acceleration?

03/22/18

#### Circular Motion with Friction

A small stone rests on the outer edge of a disk which is whirling around at about 28 rotations per minute. The diameter of the disk is .32 m.
What is the minimum coefficient of static friction...
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#### What is the radius of the circle?

A car is turning on a circular path with a constant speed of 7 m/s. If the car mass is 1200 kg and the coefficient of static friction is between the cars tires and the road .68 what is the radius...
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10/16/16

#### Rotational acceleration Physics

One end of a cord is fixed and a small 0.250-kg object is attached to the other end,where it swings in a section of a vertical circle of radius 1.50 m as shown in the figure below. When θ =...
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Circular Motion Physics

09/26/16

#### Kepler's third law

Sir/madam as F=GMM/R2 and by Kepler's third law it is T2 proportion to R3
HENCE can I say F=GMMK/T4\3 where K is arbitrary constant after removing proportionality sign ?

#### What am I doing wrong in this problem?

The County Fair Swing carries the mass of riders and chairs in a circular path in a horizontal plane while suspended by cables or chains. Let's assume that:Each chair with riders is supported by a...
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Circular Motion

01/15/16

#### What is the centripetal acceleration of the hammer?

An athlete whirls an 8.96 kg hammer tied to the end of a 1.3 m chain in a simple horizontal circle where you should ignore any vertical deviations. The hammer moves at the rate of 1.67 rev/s....
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Circular Motion

01/15/16

#### Find the central force acting on the electron

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.19 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 5.31 ×...
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Circular Motion Physics

07/20/14

#### Circular motion (Centripetal force)

A U-tube with the distance between the limbs 25.0cm. The U-tube is filled with a liquid. Calculate the difference in height of the liquid level when
a) The tube moves along the horizontal with...
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