« previous next »

Author Question: A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as ... (Read 189 times)

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
on: Jul 28, 2018

A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure. The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface. If the masses stick together, what is their speed after the collision?
 
   


   
  a.
  2.1 m/s
   
  b.
  1.7 m/s
   
  c.
  1.9 m/s
   
  d.
  1.5 m/s
   
  e.
  2.3 m/s

Question 2

Two equal masses are raised at constant velocity by ropes that run over pulleys, as shown below. Mass B is raised twice as fast as mass A. The magnitudes of the forces are FA and FB, while the power supplied is respectively PA and PB. Which statement is correct?
 
 
 
   
  a.
  FB = FA; PB = PA.
   
  b.
  FB = FA; PB = 2 PA.
   
  c.
  FB = 2 FA; PB = PA.
   
  d.
  FB = 2 FA; PB = 2 PA.
   
  e.
  PA = FA; PB = FB.


Chou

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


Chou

  • Sr. Member
  • ****
  • Posts: 335
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p
Apply gentle circular friction to the temple area. Apply gentle circular friction to the temple area.
How to find the equation of a line that is parallel to a line passing through a point How to find the equation of a line that is parallel to a line passing through a point
There has been a widespread loss of glacier mass globally There has been a widespread loss of glacier mass globally
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
A uniform solid cylinder of radius R and a thin uniform spherical shell of radius R both roll ... A uniform solid cylinder of radius R and a thin uniform spherical shell of radius R both roll ...
Video: Stretch reflex & Tendon reflex

For a complete list of videos, visit our video library