A small 0.360-kg object moves on a frictionless horizontal table in a circular path of radius 3.00 m. The angular speed is 4.97 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under the table begins to pull the string downward to make the circle smaller. If the string will tolerate a tension of no more than 160 N, what is the radius of the smallest possible circle on which the object can move?

Q: There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a…

A: Given:Angular velocity of the cylinder = 1.36 rev per secondRadius of the cylinder, R = 11.4 cm =…

Q: A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.929 rad/s.…

A: Given, Circular platform rotates ccw 90.7 kg radius 1.83 m, 0.929 rad/s You 71.7 kg, cw 1.19m/s, at…

Q: A stone with a mass of 0.5 kg is tied to a string 1.2 m long and is whirled in a vertical circle. If…

A: It is given that m=0.5 kgr=1.2 mT=20 N

Q: There is a CD-rom that's spinning a CD at 2,000 rpm. There is a bit of dirt, weighing 0.220 g,…

A:

Q: A 1.6 kg rock is swung in a circular path and in a vertical plane on a 2.9 m length string. At the…

A:

Q: A common carnival ride, called a gravitron, is a large cylinder in which people stand against the…

A:

Q: A car is driving on a flat, circular track and accelerates uniformly from rest with a tangential…

A:

Q: A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 30 cm diameter stone…

A: friction force=Normal Force(coefficient of static friction) friction force=Torque/r Torque=angular…

Q: A carousel spins at an angular velocity of +1.2 rad/s. The brake is applied and the carousel…

A: The initial angular velocity of the carousel ω0=1.2 rad/s The final angular velocity of the carousel…

Q: Two bugs, Buzz and Crunchy, are siting on a spinning disk on a horizontal plane. Buzz is sitting…

A: The force that causes an object to follow a circular trajectory is known as the centripetal force.…

Q: One end of a cord is fixed and a small 0.500-kg object is attached to the other end, where it swings…

A: According to company policy only first three subparts will be answered here. Please post the rest…

Q: A 1.3 kg rock is swung in a circular path and in a vertical plane on a 2.1 m length string. At the…

A: Mass, m = 1.3 kgLength, r = 2.1 mAngular velocity, ω = 12 rad/s

Q: You are swinging a 0.45 kg water balloon vertically. The distance from your shoulder (acting as the…

A:

Angular Momentum

The momentum of an object is given by multiplying its mass and velocity. Momentum is a property of any object that moves with mass. The only difference between angular momentum and linear momentum is that angular momentum deals with moving or spinning objects. A moving particle's linear momentum can be thought of as a measure of its linear motion. The force is proportional to the rate of change of linear momentum. Angular momentum is always directly proportional to mass. In rotational motion, the concept of angular momentum is often used. Since it is a conserved quantity—the total angular momentum of a closed system remains constant—it is a significant quantity in physics. To understand the concept of angular momentum first we need to understand a rigid body and its movement, a position vector that is used to specify the position of particles in space. A rigid body possesses motion it may be linear or rotational. Rotational motion plays important role in angular momentum. 

Moment of a Force

The idea of moments is an important concept in physics. It arises from the fact that distance often plays an important part in the interaction of, or in determining the impact of forces on bodies. Moments are often described by their order [first, second, or higher order] based on the power to which the distance has to be raised to understand the phenomenon. Of particular note are the second-order moment of mass (Moment of Inertia) and moments of force.