11. A motor spins a disk (Idisk = 24.2 kg*m2) with a torque of 39 N*m,...
11. A motor spins a disk (Idisk = 24.2 kg*m2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.3 m. Attached to the disk at a radius of 1.8 m is a 10 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?
12. A 1.4-kg projectile is fired from level ground. The vertical component of the initial velocity is 83 m/s and the horizontal component is 24 m/s. Ignore air resistance and the curvature of the earth in this problem. How far in meters does the projectile travel horizontally?
Homework Answers
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11. A motor spins a disk (Idisk = 24.2
kg*m2) with a torque of 39 N*m,...
A motor spins a disk (Idisk = 25.8 kg*m2) with a torque of 38 N*m, and...
A motor spins a disk (Idisk = 25.8 kg*m2) with a torque of 38 N*m, and a 18 N frictional force acts on the disk at a radius of 1.3 m. Attached to the disk at a radius of 1.8 m is a 3 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?
A motor spins a disk (Idisk = 25.5 kg*m2) with a torque of 39 N*m, and...
A motor spins a disk (Idisk = 25.5 kg*m2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.4 m. Attached to the disk at a radius of 6.6 m is a 13 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?
A motor spins a disk (Idisk = 25 kg*m2) with a torque of 38 N*m, and...
A motor spins a disk (Idisk = 25 kg*m2) with a torque of 38 N*m, and a 18 N frictional force acts on the disk at a radius of 1.4 m. Attached to the disk at a radius of 2.1 m is a 2.9 kg mass. What is the magnitude of the net torque in N*m of the system?
A motor spins a disk (Idisk = 24.6 kg*m2) with a torque of 38 N*m, and...
A motor spins a disk (Idisk = 24.6 kg*m2) with a torque of 38 N*m, and a 19 N frictional force acts on the disk at a radius of 1.6 m. Attached to the disk at a radius of 1.8 m is a 3.1 kg mass. What is the moment of inertia of the system?
A motor spins a disk (Idisk = 25.9 kg*m^2) with a torque of 38 N*m, and...
A motor spins a disk (Idisk = 25.9 kg*m^2) with a torque of 38 N*m, and a 19 N frictional force acts on the disk at a radius of 1.5 m. Attached to the disk at a radius of 1.5 m is a 5 kg mass. What is the magnitude of the angular acceleration in rad/s^2 of the system?
A.) In a fit, a toddler throws straight down his favorite 3 kg toy with an...
A.) In a fit, a toddler throws straight down his favorite 3 kg toy with an initial velocity of 2.5 m/s. What is the magnitude of the change in velocity of the toy from t = 0.24 seconds to t = 0.48 seconds? B.) A motor spins a disk (Idisk = 24.4 kg*m2) with a torque of 40 N*m, and a 19 N frictional force acts on the disk at a radius of 1.6 m. Attached to the disk at...
A 5 kg ball traveling to the right at 5 m/s collides with a 4 kg...
A 5 kg ball traveling to the right at 5 m/s collides with a 4 kg ball at rest. After the collision, the 4 kg ball is traveling to the right at 5.556 m/s. What is the velocity of the ball on the left after the collision? A motor spins a disk (Idisk = 24.4 kg*m2) with a torque of 39 N*m, and a 10 N frictional force acts on the disk at a radius of 2 m. Attached to...
A uniform disk with mass m = 9.07 kg and radius R = 1.36 m lies...
A uniform disk with mass m = 9.07 kg and radius R = 1.36 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 313 N at the edge of the disk on the +x-axis, 2) a force 313 N at the edge of the disk on the –y-axis, and 3) a force 313 N acts at the edge of the disk at an angle θ =...
1) What is the magnitude of the torque on the disk about the z axis due...
1)
What is the magnitude of the torque on the disk about the z axis
due to F1?
N-m
2)
What is the magnitude of the torque on the disk about the z axis
due to F2?
N-m
3)
What is the magnitude of the torque on the disk about the z axis
due to F3?
N-m
4)
What is the x-component of the net torque about the z axis on
the disk?
N-m
5)
What is the y-component of...
A motor provides the torque necessary to keep a gear turning at constant angular velocity, overcoming...
A motor provides the torque necessary to keep a gear turning at
constant angular velocity, overcoming friction between the gear and
the axle.
The gear can be modeled as a disk, with mass 2 kg, and radius
rg = 0.2 m. The force of friction can be
modeled as a single force, acting at the outer edge of the axle, at
position ra = 0.02 meters, with force of
fk = 10 N.
a) What is the magnitude of the...
1)
What is the magnitude of the torque on the disk about the z axis
due to F1?
N-m
2)
What is the magnitude of the torque on the disk about the z axis
due to F2?
N-m
3)
What is the magnitude of the torque on the disk about the z axis
due to F3?
N-m
4)
What is the x-component of the net torque about the z axis on
the disk?
N-m
5)
What is the y-component of...
A motor provides the torque necessary to keep a gear turning at
constant angular velocity, overcoming friction between the gear and
the axle.
The gear can be modeled as a disk, with mass 2 kg, and radius
rg = 0.2 m. The force of friction can be
modeled as a single force, acting at the outer edge of the axle, at
position ra = 0.02 meters, with force of
fk = 10 N.
a) What is the magnitude of the...
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