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 756 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 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Ground cover and colour such as shown here in (a) white sand Ground cover and colour such as shown here in (a) white sand
Lewis symbols,(Figure 1) Lewis symbols,(Figure 1)
front muscle figure front muscle figure
Mobilize joints of the feet and ankle. Apply scissoring to metatarsals and figure-8s to toes. Dorsi- ... Mobilize joints of the feet and ankle. Apply scissoring to metatarsals and figure-8s to toes. Dorsi- ...
Re-creation of Pheidias’s Huge Gold and Ivory Figure of Athena Re-creation of Pheidias’s Huge Gold and Ivory Figure of Athena
Refer to (d) in the figure above. This rectifier arrangement Refer to (d) in the figure above. This rectifier arrangement
Video: Autonomic Nervous System Animation

For a complete list of videos, visit our video library