This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: An 8.0-m massless rod is loosely pinned to a frictionless pivot at 0, as shown in the figure. A very ... (Read 741 times)

silviawilliams41

  • Hero Member
  • *****
  • Posts: 560
on: Jul 29, 2018
An 8.0-m massless rod is loosely pinned to a frictionless pivot at 0, as shown in the figure. A very small 4.0-kg ball is attached to the other end of the rod.
 
  The ball is held at A, where the rod makes a 30 angle above the horizontal, and is released. The ball-rod assembly then swings freely with negligible friction in a vertical circle between A and B. The tension in the rod when the ball passes through the lowest point at D is closest to
 
  A) 160 N.
  B) 200 N.
  C) 120 N.
  D) 80 N.
  E) 40 N.

Question 2

A mass is pressed against (but is not attached to) an ideal horizontal spring on a frictionless horizontal surface. After being released from rest, the mass acquires a maximum speed v and a maximum kinetic energy K.
 
  If instead the mass initially compresses the spring twice as far:
  A) Its maximum speed will be 2v and its maximum kinetic energy will be 2K.
  B) Its maximum speed will be 2v and its maximum kinetic energy will be K.
  C) Its maximum speed will be v and its maximum kinetic energy will be 2K.
  D) Its maximum speed will be 2v and its maximum kinetic energy will be 4K.
  E) Its maximum speed will be 4v and its maximum kinetic energy will be 2K.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Amiracle

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: C


silviawilliams41

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


Amiracle

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

An electrocardiogram (ECG, EKG) is a commonly used procedure in which the electrical events associat An electrocardiogram (ECG, EKG) is a commonly used procedure in which the electrical events associat
Each of the eight injectors shown are producing a correct spray pattern for the applications. While ... Each of the eight injectors shown are producing a correct spray pattern for the applications. While ...
The major cortical input and output pathways of the posterior parietal association cortex. Shown are ... The major cortical input and output pathways of the posterior parietal association cortex. Shown are ...
A current-carrying wire is placed in a uniform magnetic field, as shown below. A current-carrying wire is placed in a uniform magnetic field, as shown below.
Refer to (d) in the figure above. This rectifier arrangement Refer to (d) in the figure above. This rectifier arrangement
What is the total resistance of the circuit in Figure 1? 150 What is the total resistance of the circuit in Figure 1? 150
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library