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

Author Question: A solid steel ball is dropped from a great height and when its speed reaches 20 m/s its acceleration ... (Read 117 times)

kellyjaisingh

  • Hero Member
  • *****
  • Posts: 540
on: Jul 28, 2018
A solid steel ball is dropped from a great height and when its speed reaches 20 m/s its acceleration downward is 7.35 m/s2 . What would be the terminal velocity in this situation?
 a. 80 m/s
  c. 40 m/s
  b. 60 m/s
  d. 20 m/s

Question 2

A sphere is dropped from a great height and when its speed reaches 20 m/s, its acceleration downward is 8.4 m/s2 . If the drag force is proportional to the square of the speed, what will be its acceleration downward when its speed reached 40 m/s?
 a. 2.6 m/s2
  b. 4.2 m/s2
  c. 8.0 m/s2
  d. 0 m/s2 because it has now reached terminal velocity.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

huda

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


kellyjaisingh

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 28, 2018
TY


huda

  • Sr. Member
  • ****
  • Posts: 304
Reply #3 on: Jul 28, 2018
You're welcome


« previous next »
 

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Two invaders of the Great Lakes: (a) sea lamprey Two invaders of the Great Lakes: (a) sea lamprey
A small sample of the great diversity of seed sizes and shapes. A small sample of the great diversity of seed sizes and shapes.
Great Book For Essentials of Biochemistry Great Book For Essentials of Biochemistry
Great Sphinx, Funerary Complex of Khafre "أبو الهول" Great Sphinx, Funerary Complex of Khafre "أبو الهول"
Using a Steel Using a Steel
A 400-g piece of metal at 120°C is dropped into a cup containing 450 g of water A 400-g piece of metal at 120°C is dropped into a cup containing 450 g of water
Video: Vasectomy

For a complete list of videos, visit our video library