To apply the principle of angular impulse and momentum to describe a particle's motion.
The moment of a force about a point O, fixed in an inertial coordinate system, MO, and the angular momentum about the same point, HO, are related as follows:
∑MO=H˙O
where H˙O is the time derivative of the angular momentum, HO=r×mv. Integrating this equation with respect to time yields the following equation:
∑∫t2t1MO dt=(HO)2−(HO)1
This equation is the principle of angular impulse and momentum, and it is often rearranged to its more familiar form
(HO)1+∑∫t2t1MO dt=(HO)2
A centrifugal governor consists of a central rotating shaft that has two thin, pin-connected rods attached to it; a heavy sphere caps the end of each rod. (Figure 1) A centrifugal governor mechanically limits an engine's speed. A part of the engine turns the centrifugal governor, and if the speed exceeds a set amount, the height of the spheres decreases the driving force of the engine by reducing the fuel flow. The two rods move freely about the pin. If the whole apparatus is rotating about the central shaft and the spheres have a tangential velocity, v, the thin rods will create an angle, θ, between each rod and the central shaft. Develop an equation for the tangential velocity, v, in terms of some or all of the following: θ, the angle between the thin rods and the central shaft; l, the length from the pin to each sphere's center; m, each sphere's mass; and g, the acceleration due to gravity. Neglect the mass of the thin rods.
For the same centrifugal governor introduced in Part A, assume that each sphere's center is located at a distance l = 16.5 cm from the pin and the mass of each sphere is m = 760 g . If the angle between each thin rod and the central shaft is θ = 11.0 ∘ when the apparatus is rotating, what is H1, the angular momentum of the two spheres? Neglect the mass of the thin rods.
Express your answer numerically to three significant figures with the appropriate units.
To apply the principle of angular impulse and momentum to describe a particle's motion. The momen...
Can someone help me with part B?
Part A A centrifugal governor consists of a central rotating shaft that has two thin, pin-connected rods attached to it, a heavy sphere caps the end of each rod. (Figure 1) A centrifugal governor mechanically limits an engine's speed. A part of the engine turns the centrifugal governor, and if the speed exceeds a set amount, the height of the spheres decreases the driving force of the engine by reducing the fuel fow....
Principle of Angular Impulse and Momentum 2 of 8 To apply the principle of angular impulse and momentum to find final speed and the time to reach a given speerd As shown, ball B, having a mass of 10.0 kg, is attached to the end of a rod whose mass can be neglected Part A - Finding the final speed of the ball If the rod is 0.550 m long and subjected to a torque M = (2.45t2 + 3.45)...
1. What is the angular momentum of a 0.240-kg ball rotating on the end of a thin string in a circle of radius 1.35 m at an angular speed of 15.0 rad/s ? 2. A diver can reduce her moment of inertia by a factor of about 4.0 when changing from the straight position to the tuck position. If she makes 2.0 rotations in 1.5 s when in the tuck position, what is her angular speed (rev/s) when in the...
Part A - Angular Acceleration of the Rod Learning Goal: To apply the equations of motion to a system that involves rotation about a fixed axis and to use this information to determine key characteristics. The slender rod AB shown has a mass of m = 71.0 kg and is being supported by a rope and pulley system stationed at C. Starting from rest in the position shown), the rope and pulley system tug on the rod causing it to...
To apply the equations of motion to a system that involves
rotation about a fixed axis and to use this information to
determine key characteristics.
The slender rod AB shown has a mass of m=57.0 kg and is being
supported by a rope and pulley system stationed at C. Starting from
rest (in the position shown), the rope and pulley system tug on the
rod causing it to rotate about A. The torque applied to the pulley
is T=2.25 kN⋅m...
2. A bar on a hinge starts from rest and rotates with an angular acceleration α (10 + 61), where α is in rad/s" and 1 is in seconds. Determine the angle in radians through which the bar turns in the first 4.00 s. 4. A dentist's drll starts from rest. After 3.20 s of constant an- gular acceleration, it turns at a rate of 2.51 × 104 rev/min. (a) Find the drill's angular acceleration. (b) Determine the angle (in...