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

Author Question: A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the ... (Read 385 times)

itsmyluck

  • Hero Member
  • *****
  • Posts: 546
on: Jul 28, 2018

A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the mass at point A is 8.4 m/s, and at point B, it is 5.6 m/s. What is the change in mechanical energy between A and B caused by the force of friction?
 
   


   
  a.
  2.7 J
   
  b.
  8.8 J
   
  c.
  4.7 J
   
  d.
  6.7 J
   
  e.
  19 J

Question 2

A 1.2-kg mass is projected down a rough circular track (radius = 2.0 m) as shown. The speed of the mass at point A is 3.2 m/s, and at point B, it is 6.0 m/s. What is the change in mechanical energy done on the system between A and B by the force of friction?
 
   


   
  a.
  8.9 J
   
  b.
  7.3 J
   
  c.
  8.1 J
   
  d.
  6.6 J
   
  e.
  24 J


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nmyers

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


itsmyluck

  • Member
  • Posts: 546
Reply 2 on: Jul 28, 2018
Gracias!

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

GI series. (a) Upper GI series begins with a barium swallow, barium shake, or barium meal. (b) Lower GI series. (a) Upper GI series begins with a barium swallow, barium shake, or barium meal. (b) Lower
Label the four mutated DNA segments shown below according to the type of point mutation each ... Label the four mutated DNA segments shown below according to the type of point mutation each ...
Desmosomes and gap junctions, as shown in heart muscle. Desmosomes and gap junctions, as shown in heart muscle.
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 ...
A container in the shape of a right circular cylinder with no top has surface area square feet. A container in the shape of a right circular cylinder with no top has surface area square feet.
Escape Speed Problem Escape Speed Problem
Video: Polysaccharides

For a complete list of videos, visit our video library