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

Author Question: An empty train car of mass 2.0 x 104 kg coasts along at 10 m/s. A 3000-kg boulder is suddenly ... (Read 5 times)

cookcarl

  • Hero Member
  • *****
  • Posts: 539
on: Jul 29, 2018
An empty train car of mass 2.0 x 104 kg coasts along at 10 m/s. A 3000-kg boulder is suddenly dropped vertically into the car. Find the speed of the car immediately after the boulder is dropped in.
 
  What will be an ideal response?

Question 2

Three cars (car L, car M, and car N) are moving with the same speed and slam on their brakes. The most massive car is car L, and the least massive is car N.
 
  If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest? A) The amount of work done by friction is the same for all cars.
  B) Car L
  C) Car M
  D) Car N


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

wilsonbho

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

8.7 m/s

Answer to Question 2

B


cookcarl

  • Member
  • Posts: 539
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

jomama

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

A Coronal Mass Ejection A Coronal Mass Ejection
Due to compressibility, atmospheric mass gradually “thins out” with height. Due to compressibility, atmospheric mass gradually “thins out” with height.
Air-Mass Source Regions for North America Air-Mass Source Regions for North America
Atomic Number and Mass Number Atomic Number and Mass Number
A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass. What mass of H will ... A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass. What mass of H will ...
A triatomic molecule is oriented as follows along the x-axis: atom 1 of mass m is at the ... A triatomic molecule is oriented as follows along the x-axis: atom 1 of mass m is at the ...
Video: Electrical changes in the heart

For a complete list of videos, visit our video library