« previous next »

Author Question: Jacques and George meet in the middle of a lake while paddling in their canoes. They come to a ... (Read 50 times)

wrbasek0

  • Hero Member
  • *****
  • Posts: 560
on: Jul 29, 2018
Jacques and George meet in the middle of a lake while paddling in their canoes. They come to a complete stop and talk for a while. When they are ready to leave, Jacques pushes George's canoe with a force to separate the two canoes.
 
  What is correct to say about the final momentum and kinetic energy of the system if we can neglect any resistance due to the water?
  A) The final momentum is in the direction of but the final kinetic energy is zero.
  B) The final momentum is in the direction opposite of but the final kinetic energy is zero.
  C) The final momentum is in the direction of and the final kinetic energy is positive.
  D) The final momentum is zero and the final kinetic energy is zero.
  E) The final momentum is zero but the final kinetic energy is positive.

Question 2

A 2.50-kg stone is dropped from rest at a height of 3.75 m. What impulse does gravity impart to this stone from the instant it is dropped until it hits the ground, assuming negligible air resistance?
 
  What will be an ideal response?


mfedorka

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: 21.4 N  s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Middle nasal conchae Middle nasal conchae
An 1827 portrait by George Catlin of Eeh-Nis-Kin (Crystal Stone), a Blackfoot woman. An 1827 portrait by George Catlin of Eeh-Nis-Kin (Crystal Stone), a Blackfoot woman.
Processes of the Middle and Upper Troposphere: Rossby Waves and Vorticity Processes of the Middle and Upper Troposphere: Rossby Waves and Vorticity
Man-in-the-middle attack Man-in-the-middle attack
Video: DNA Sequences - Dideoxy Sequencing

For a complete list of videos, visit our video library