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 34 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!

shailee

  • Member
  • Posts: 392
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

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?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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
A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ... A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ...
Thumb slides to Achilles tendon. Thumb slides to Achilles tendon.
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 ...
Find the curved line Find the curved line
You ride a motor scooter 8 km in 10 minutes. Your speed is You ride a motor scooter 8 km in 10 minutes. Your speed is
Video: Vasectomy

For a complete list of videos, visit our video library