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# Angular Momentum

### Mechanics, rotation, angular deceleration. Part 3

A flywheel initially rotating at a speed of 800 rev/min, is brought to rest with uniform angular deceleration in 6's c. At what time will both the radial and tangential components of acceleration be equal in magnitude?

### Mechanics, rotation, angular deceleration. Part 2

This question is posted in three parts this is part 2

### Mechanics, rotation, angular deceleration.

I am posting this question in three parts please see the attachment, this is part one

### Angular Velocity of a Block on a Heated Spinning Rod

A 1.10 m-long massless rod is pivoted at one end and swings around in a circle on a frictionless table. A block with a hole through the center can slide in and out along the rod. Initially, a small piece of wax holds the block 10.0 cm from the pivot. The block is spun at 50.0 rpm, then the temperature of the rod is slowly increa

### Bohr Quantium Condition

A particle of mass m is attracted to the origin by a force proportional to the distance from the origin F = -kr. Assume that it moves in circular orbit of radius r. a) Use Newton's law to show that its kinetic energy 1/2mv^2 equals its potential energy 1/2kr^2. b) Use Bohr quantum condition on the angular momentum (L = nh

### Angular momentum of a projectile

A particle of mass M is shot with an initial velocity Vi and makes an angle theta with the horizontal. The particle moves in the gravitational field of the earth. Find the angular momentum of the particle about the origin when the particle is (a) at the highest point of the trajectory and (b) just about to hit the ground.

### Conservation of angular momentum when a system changes configuration.

A uniform cylinder, mass M= 12 kg, radius R= .36 m, is initially rotating about a vertical axis through its center at angular velocity wo= 6.6 rad/sec. Now two small (point masses), each of mass m= 2 kg, are dropped onto and stick to the cylinder, each at distance r= .24 m from the axis. SEE ATTACHMENT for diagram. Find wf, t

### Earth Precess Graphs

Why does Earth precess? Could you explain in sentences not just shown the graph.

### Moment of Inertia for Figure Skater

A figure skater during her finale can increase her rotation rate from an initial rate of 1.12 revolutions every 1.88 s to a final rate of 3.15 revolutions per second. If her initial moment of inertia was 4.73 kg* m2, what is her final moment of inertia?

### An Arcsecond Degree

An arcsecond is what of a degree?

### Rolling, Torque , and Angular Momentum

Rolling, Torque , and Angular Momentum 1. A constant horizontal force of magnitude 10 N is applied to a wheel of mass 10 kg and radius 0.30 m as shown in the figure below. The wheel rolls smoothly on the horizontal surface and the acceleration of its center of mass has magnitude 0.60 m/s^2. ( a) what are the magnitude and

### Moving mass m collides with stationary mass M attached to a spring on a frictionless table. Write SHM equations.

SEE ATTACHMENT #1 for a diagram of parameters and a reference circle. On a horizontal, frictionless table, a mass M is attached to the free end of a spring with the other end fixed. Another mass, m, moving at velocity S, collides and sticks to mass M and at that point, SHM begins. The spring's force constant is k. PART a.

### Finding the Ratio of Final Period to Initial Period

A uniform sphere, mass M= 84 kg, radius R, has two uniform, thin, flexible bars each with mass m= 25 kg, and length half a circumference, wrapped on its surface as shown in Fig. 1. The system is rotating with a period To about a c.m. axis at center. At some instant, the bars fly outward to form a new configuration shown in Fig.

### Express the angular momentum of a marble moving first past and around an axis.

See attached file. Definition 1: The linear momentum, vector p, of an object is its mass, m, times its velocity, vector v. Definition 2: The angular momentum, vector L, of an object about an axis, is defined as the cross product of the position, vector R, relative to the axis, and its linear momentum, vector p. Definition 3

### Physics Central Force: find effective potential energy and sketch

A particle of mass 50g moves under an attractive central force of magnitude 4r^3 dynes. The angular momentum is equal to l,000 g*cm/s. a) Find the effective potential energy. b) Indicate on a sketch of the effective potential the total energy for circular motion. c) The radius of the particle's orbit varies between ro an

### Physics: Rotational motion of a mass on a string about a rod. Final speed of the mass.

Mass m is attached to a post with radius R by a string. Initially, the mass is a distance r from the center of the post and is moving tangentially with a speed Vo. In case (a) the string passes through a hole in the center of the post at the top. The string is gradually shortened by drawing it through the hole. Case (b) the spri

### Rotational and Angular Speed of a Turn Table

A turn-table on a frictionless vertical axis has a radius of 1.5 m and a moment of rotational inertia of 150 kgm^2. It is at rest until a 75 kg person who had been standing still (and who can be treated as a point), begins to walk around the rim at a speed of 2.0 m/s with respect to the turn-table. a) what is the speed of the p

### Angular Momentum Line of Motion

A .015 kg coin of diameter .013 m is spinning at 9 rev/s about a vertical diameter at a fixed point on a tabletop. a) If the coin spins about a vertical diameter at 9 rev/s while its center of mass travels in a straight line across the tabletop at .05 m/s, what is the angular momentum of the coin about a point on the line of mot

### Understanding strength and torque.

1 Provide an example of torque that is important in your sport? 2. Define strength and explain why strength varies through a joints range of motion?

### Understanding momentum, impulse and forces in the sport of soccer.

1. Identify and explain propulsive and breaking forces in soccer? 2. Provide three examples where momentum influences soccer? 3. In soccer, outline how impulse can be increased. These questions are for a post-grad degree in elite sports coaching - (biomechanics module)

### Mechanics problem

If a rigid homogeneous rectangular crate of mass m and height h slides on its base of w, while traveling a velocity v, it stikes a low, immovable curb. What is the angular velocity of the crate immediately after the impact, in terms of m,w,h,v; and under what condition (in m,w,h,v) will the crate fall over on its side?

### Electron configuration

When the n value of an electron shell is equal to 5, the allowed values for the angular momentum quantum number are 0 to n-1. What is the subshell level label for agular momententum quantum number 4, as s is 0 p is 1 d is 2 and f 3, what would represent 4 and larger?

### Angular momentum quantization & de Broglie's matter wave

Show that angular momentum quantization of an electron in a hydrogen atom is the necessary consequence of de Broglie's matter wave concept.