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 357 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!

mcarey591

  • Member
  • Posts: 365
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Rough-Fruited Cinquefoil Rough-Fruited Cinquefoil
Evidence that Light Travels at a Finite Speed Evidence that Light Travels at a Finite Speed
Use small circular strokes up the ankle and leg. Use small circular strokes up the ankle and leg.
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.
A racing car accelerates uniformly from rest along a straight track. This track has markers ... A racing car accelerates uniformly from rest along a straight track. This track has markers ...
Video: ACTH/Cortisol (glycogenolysis, protein catabolism, lipolysis and gluconeogenesis)

For a complete list of videos, visit our video library