Three forces are applied to a wheel of radius 0.350 mm, as shown in the figure (Figure 1). One force is perpendicular to the rim, one is tangent to it, and the other one makes a 40.0∘∘ angle with the radius. a) What is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center? Express your answer in newton-meters. b) What is the direction of the net torque in part (A)? What is the direction of the net torque in part (A)? into the page out 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.
Three forces are applied to a wheel of radius 0.350 mm, as shown in the figure (Figure 1). One force is perpendicular to the rim, one is tangent to it, and the other one makes a 40.0∘∘ angle with the radius.
a)
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![**Description of the Diagram:**
The image displays a circular object with several forces acting on it. The circle has a radius of 0.350 meters, as marked in the center.
**Forces Acting on the Circle:**
1. **Force 11.9 N:** This force is directed vertically downward.
2. **Force 14.6 N:** This force is directed horizontally to the right. It is angled at 40.0° from an adjacent dashed line, indicating the direction relative to horizontal.
3. **Force 8.50 N:** This force is directed vertically upward.
**Explanation for Educational Context:**
This diagram illustrates a common physics scenario involving forces acting on a rigid body. By analyzing these vectors, one can apply concepts of equilibrium, torque, and net force to determine the resultant motion or state of rest of the object.
- **Equilibrium Analysis:** To check if the object is in equilibrium, calculate the net force along each axis (x and y directions) and ensure it is zero.
- **Torque Calculation:** Calculate the torque produced by each force to understand rotational effects. Torque (τ) is given by the formula τ = r × F × sin(θ), where r is the lever arm (distance from pivot), F is the force, and θ is the angle between the force and lever arm.
This visualization helps in understanding how different magnitudes and directions of forces influence the movement or stability of objects in a plane.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fad166430-6e44-4cf0-afe4-256160c2518e%2Fc9ca2d32-d4b5-4661-94fb-f6bc82496bfd%2F876l3yg.jpeg&w=3840&q=75)
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