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

Author Question: A 2.0-kg block slides down a fixed, rough curved track. The block has a speed of 5.0 m/s after its ... (Read 65 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 28, 2018
A 2.0-kg block slides down a fixed, rough curved track. The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 1.8 m. Assume the block starts from rest. What is the change in mechanical energy of the block caused by the force of friction during this descent?
 a. -14 J
  b. -12 J
  c. -10 J
  d. -16 J
  e. -25 J

Question 2

Two masses, MA and MB, with MB = 2MA, are released at the same time and allowed to fall straight down. Neglect air resistance. When we compare their kinetic energies after they have fallen for equal times, we find that
 a. KB = KA.
  b. KB = 2KA.
  c. KB = 4KA.
  d. KA = 2KB.
  e. KA = 4KB.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kdiggy

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


penguins

  • Member
  • Posts: 903
Reply 2 on: Jul 28, 2018
Gracias!

Chelseyj.hasty

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

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

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

microscope slides microscope slides
All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ... All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ...
When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ... When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ...
In a room where g = 9.81 m/s2, a hockey puck slides off the edge of a platform with an initial ... In a room where g = 9.81 m/s2, a hockey puck slides off the edge of a platform with an initial ...
A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 ... A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 ...
cassö, RAYE, D-Block Europe - Prada (Lyrics) cassö, RAYE, D-Block Europe - Prada (Lyrics)
Video: The Lagging Strand in DNA Replication and Replication in Action

For a complete list of videos, visit our video library