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

Author Question: John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air ... (Read 72 times)

Bernana

  • Hero Member
  • *****
  • Posts: 530
on: Jul 28, 2018
John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the rock's speed just as it hits the ground?
 a. 19 m/s
  b. 25 m/s
  c. 610 m/s
  d. 22 m/s
  e. 12 m/s

Question 2

Gwen releases a rock at rest from the top of a 40-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the speed of the rock as it hits the ground?
 a. 28 m/s
  b. 14 m/s
  c. 20 m/s
  d. 40 m/s
  e. 780 m/s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jane

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

a


Bernana

  • Member
  • Posts: 530
Reply 2 on: Jul 28, 2018
Excellent

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

John Muir John Muir
Layers of Rock Laid Down by Water Layers of Rock Laid Down by Water
Regions of Exceptionally Hot Rock Regions of Exceptionally Hot Rock
Nicolas Poussin, Landscape with St. John on Patmos. Nicolas Poussin, Landscape with St. John on Patmos.
A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ... A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ...
Floating rock illusion Floating rock illusion
Video: Pressure volume relationships - Normal inspiration and expiration

For a complete list of videos, visit our video library