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 739 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?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th
Identify the structures shown below by filling in the blanks. Identify the structures shown below by filling in the blanks.
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 ...
Adolf Hitler, shown here in Nuremberg in 1938, was one of the most influential—and evil—persons ... Adolf Hitler, shown here in Nuremberg in 1938, was one of the most influential—and evil—persons ...
A PCV valve shown in a cutaway valve cover showing the baffles that prevent liquid oil from being ... A PCV valve shown in a cutaway valve cover showing the baffles that prevent liquid oil from being ...
Figure-8s at the knuckles of the hand. Figure-8s at the knuckles of the hand.
Video: Protein catabolism - deamination

For a complete list of videos, visit our video library