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... more
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?... more
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?
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?
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?
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... more
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... more
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... more
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?
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... more
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... more
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 =... more
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... more
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.... more
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 ×... more