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

Author Question: A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5 grade. If the track is considered to be ... (Read 49 times)

penza

  • Hero Member
  • *****
  • Posts: 1,022
on: Jul 28, 2018
A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5 grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?
 a. 0.37 m/s
  c. 2.6 m/s
  b. 0.59 m/s
  d. 4.3 m/s

Question 2

As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
 a. greater than the tension would be if the box were stationary.
  b. greater than the weight of the box.
  c. equal to the weight of the box.
  d. less than the weight of the box.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

whitcassie

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

D


penza

  • Hero Member
  • *****
  • Posts: 1,022
Reply #2 on: Jul 28, 2018
Thank you!


whitcassie

  • Sr. Member
  • ****
  • Posts: 298
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

The Border Collie is considered to be one of the most intelligent breeds. The Border Collie is considered to be one of the most intelligent breeds.
Electrospray mass spectrometry of a protein Electrospray mass spectrometry of a protein
Mass Wasting Triggers Mass Wasting Triggers
A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ... A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ...
A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude ... A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude ...
An 8th grade class develops a linear model that predicts the number of cheerios (a small round ... An 8th grade class develops a linear model that predicts the number of cheerios (a small round ...
Video: Factors that influence muscle tension - Sarcomere length and force, understretched and overstretched

For a complete list of videos, visit our video library