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 754 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?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Shown here is Sigmund Freud in 1931 as he poses for a sculptor in Vienna, Austria. Although Freud ... Shown here is Sigmund Freud in 1931 as he poses for a sculptor in Vienna, Austria. Although Freud ...
Demonstrate the Application of Triangular, Figure-Eight, and Tubular Bandages Demonstrate the Application of Triangular, Figure-Eight, and Tubular Bandages
This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ... This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ...
In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ... In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ...
Frequency distribution of phenotypes from the possible offspring in Figure 5.7. Height of the offspr Frequency distribution of phenotypes from the possible offspring in Figure 5.7. Height of the offspr
Which of the 3 structures shown below has the shortest bond length? Justify your answer. Which of the 3 structures shown below has the shortest bond length? Justify your answer.
Video: Methods of carbon dioxide transport - carbaminohemoglobin and bicarbonate ions

For a complete list of videos, visit our video library