Which of the following are in equilibrium? Choose all that apply. [NOTE: "spinning up" means the...
Which of the following are in equilibrium? Choose all that apply. [NOTE: "spinning up" means the rate of spin is increasing. "spinning down" means the rate of spin is decreasing.]
A disc that is speeding up and is not rotating.
A baseball that is at rest and has a constant angular velocity.
A turntable that has a constant velocity and is spinning up.
A tire that is speeding up and is spinning up.
A wheel that is at rest and is not rotating.
A football that is speeding up and is spinning down.
A merry-go-round that is slowing down and is spinning up.
A planet that moves along a perfectly circular orbit at a constant speed.
Homework Answers
Equilibrium means no spinning up, no spinning down, no speeding up, no speeding down, no change in speed. Planet has centripetal force so not in equilibrium.
Answers are
A baseball that is at rest and has a constant angular velocity.
A wheel that is at rest and is not rotating.
Add Answer to:
Which of the following are in equilibrium? Choose all that
apply. [NOTE: "spinning up" means the...
In which of the following situations is the object's velocity changing? Choose all that apply A...
In which of the following situations is the object's velocity changing? Choose all that apply A person is walking straight west at a constant speed. None of the objects is accelerating. A truck drives at a constant 30-mph as it goes up a hill with a constant incline. A helicopter is ascending straight upward without speeding up or slowing down. A car speeds up while driving north along a level road. A train rounds a curve without changing speed car...
R r up Left Right Down A spinning disk is rotating at a rate of 2 rad/s in the counterclockwise d...
r r up Left Right Down A spinning disk is rotating at a rate of 2 rad/s in the counterclockwise direction as shown in the figure. What is the direction of the angular velocity vector? Incorrect right Incorrect down Correct: up Incorrect left s answer now shown above. You are correct. receipt no. is 160-4295 If the disk is speeding up at a rate of 2 rad/s2, what is the direction of the angular acceleration vector? Incorrect down Incorrect left...
Which of the following are Kepler's Laws of Planetary Motion? (Choose all that apply.) The planets...
Which of the following are Kepler's Laws of Planetary Motion? (Choose all that apply.) The planets sweep out equal areas in equal times The torque on a planet about the sun's position is zero O The planets travel in conic sections 12oxas The planets travel in ellipses around the sun with the sun at one focus От3 ока2 An object completely submerged in an incompressible fluid is at rest. Which of the following are true? (Select all that apply.) The...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5 m on a merry-go-round (rmgr = 2.0 m, Imgr = 1000 kg*m2) with a constant force F = 90 N applied tangentially to the edge of the merry-go-round (i.e., the force is perpendicular to the radius). The merry-go-round resists spinning with a frictional force of f = 10 N acting at a radius of 1 m and a frictional torque τ = 15 N*m...
1.) For a rotating rigid body which of the following statements is not correct? a.) all...
1.) For a rotating rigid body which of the following statements is not correct? a.) all points along a rotating rigid body move with constant speed b.) points along a rotating body move through the same angle in equal time intervals c.) point along a rotating body have velocities that continuously change directions d.) all of the above 2.) Which of the following quantities will impact how a rigid body's rotational speed can change? a.) the body's rotational inertia b.)the...
PLEASE SHOW WORK AND ANSWER ALL PARTS. WHEN I ASKED THE SECTIONS SEPARATELY THE ANSWERS DID NOT MATCH, THANK YOU!!! All of the questions on this concern a space station, consisting of a long thin unif...
PLEASE SHOW WORK AND ANSWER ALL PARTS. WHEN I ASKED THE
SECTIONS SEPARATELY THE ANSWERS DID NOT MATCH, THANK
YOU!!!
All of the questions on this concern a space station, consisting
of a long thin uniform rod of mass 4.4 x
106kg and length 171 meters,
with two identical uniform hollow spheres, each of mass 1.3
x 106 kg and radius 57 meters,
attached at the ends of the rod, as shown below. Note that none
of the diagrams shown...
this is one question with many parts, thanks for the help! A Imagine a negatively charged...
this is one question with many parts, thanks for the
help!
A Imagine a negatively charged particle, A approaching another negatively charged particle, B, along the path shown in the diagram. A moves from point X to point Y. These two particles form an isolated system, which means no work is done by external forces; therefore, the system's total energy does not change. A foelsan clectrical force (an repelling force) from B while it approaches B. Therefore, work is done...
In which of the following situations is the object's velocity changing? Choose all that apply A person is walking straight west at a constant speed. None of the objects is accelerating. A truck drives at a constant 30-mph as it goes up a hill with a constant incline. A helicopter is ascending straight upward without speeding up or slowing down. A car speeds up while driving north along a level road. A train rounds a curve without changing speed car...
r r up Left Right Down A spinning disk is rotating at a rate of 2 rad/s in the counterclockwise direction as shown in the figure. What is the direction of the angular velocity vector? Incorrect right Incorrect down Correct: up Incorrect left s answer now shown above. You are correct. receipt no. is 160-4295 If the disk is speeding up at a rate of 2 rad/s2, what is the direction of the angular acceleration vector? Incorrect down Incorrect left...
Which of the following are Kepler's Laws of Planetary Motion? (Choose all that apply.) The planets sweep out equal areas in equal times The torque on a planet about the sun's position is zero O The planets travel in conic sections 12oxas The planets travel in ellipses around the sun with the sun at one focus От3 ока2 An object completely submerged in an incompressible fluid is at rest. Which of the following are true? (Select all that apply.) The...
PLEASE SHOW WORK AND ANSWER ALL PARTS. WHEN I ASKED THE
SECTIONS SEPARATELY THE ANSWERS DID NOT MATCH, THANK
YOU!!!
All of the questions on this concern a space station, consisting
of a long thin uniform rod of mass 4.4 x
106kg and length 171 meters,
with two identical uniform hollow spheres, each of mass 1.3
x 106 kg and radius 57 meters,
attached at the ends of the rod, as shown below. Note that none
of the diagrams shown...
this is one question with many parts, thanks for the
help!
A Imagine a negatively charged particle, A approaching another negatively charged particle, B, along the path shown in the diagram. A moves from point X to point Y. These two particles form an isolated system, which means no work is done by external forces; therefore, the system's total energy does not change. A foelsan clectrical force (an repelling force) from B while it approaches B. Therefore, work is done...
Most questions answered within 3 hours.
-
Which statement is not correct?
Mutations change the sequence of nucleotides in DNA.
Mutations can be...
asked 1 hour ago -
An organization is not required to accommodate an employee's
disability when the accommodation would cause "undue...
asked 1 hour ago -
Mojo Mining has a bond outstanding that sells for $2,165 and
matures in 17 years. The...
asked 1 hour ago -
Olympic weightlifter Zoe Smith holds a 58 kg barbell over her
head, 2.1 meters above the...
asked 1 hour ago -
For sample average = 28 and a μ = 17 and a s = 4 and...
asked 2 hours ago -
A
short forward contract that was negotiated some time ago will
expire in three months and...
asked 2 hours ago -
If R = R1L2/L3, what is the measurement error dR based on the
rules of error...
asked 2 hours ago -
At equilibrium, the concentrations of N2(g),
O2 (g) and NO (g) in a sealed reaction vessel...
asked 2 hours ago -
Find P(X-bar > 15.5)
n=81, Mean=15, SD=1
asked 2 hours ago -
3. What percentage of search engine users don’t go to the next
page of search results?...
asked 2 hours ago -
Since Tanya Martin retired, she has used income from her
investment in the Alger Mid Cap...
asked 2 hours ago -
Determine the point estimate of the population proportion, the
margin of error for the following confidence...
asked 2 hours ago