In this assignment, the radius refers to the distance between the location where the force is applied and the axis of rotation. A ruler is initially at rest when a student briefly exerts a downward force on the right end, as shown. The magnitude of the force exerted by the student is less than the weight of the ruler. Assume that the pivot point is frictionless. Answer the following questions based on this description. Part A: 1. While the hand is pushing, but before the ruler begins to move, the tangential acceleration of the ruler is 2. While the hand is pushing, but before the ruler begins to move, the centripetal acceleration of the ruler is 3. While the hand is pushing, but before the ruler begins to move, the angular acceleration of the ruler is 4. At the instant the hand has stopped pushing, the tangential acceleration of the ruler is 5. At the instant the hand has stopped pushing, the centripetal acceleration of the ruler is 6. At the instant the hand has stopped pushing, the angular acceleration of the ruler is 7. At the instant the hand has stopped pushing, the angular velocity of the ruler is answer options for (1-7) zero not zero and directed into the page not zero and directed out of the page not zero and directed along the ruler not zero and directed perpendicular to the ruler but in the plane of the page
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.
In this assignment, the radius refers to the distance between the location where the force is applied and the axis of rotation.
A ruler is initially at rest when a student briefly exerts a downward force on the right end, as shown. The magnitude of the force exerted by the student is less than the weight of the ruler. Assume that the pivot point is frictionless. Answer the following questions based on this description.
Part A:
1. While the hand is pushing, but before the ruler begins to move, the tangential acceleration of the ruler is
2. While the hand is pushing, but before the ruler begins to move, the centripetal acceleration of the ruler is
3. While the hand is pushing, but before the ruler begins to move, the
4. At the instant the hand has stopped pushing, the tangential acceleration of the ruler is
5. At the instant the hand has stopped pushing, the centripetal acceleration of the ruler is
6. At the instant the hand has stopped pushing, the angular acceleration of the ruler is
7. At the instant the hand has stopped pushing, the
answer options for (1-7)
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