This topic contains a solution. Click here to go to the answer

Author Question: A certain meteoroid a rock in space has been moving through our solar system ever since the solar ... (Read 92 times)

Mr.Thesaxman

  • Hero Member
  • *****
  • Posts: 514
A certain meteoroid a rock in space has been moving through our solar system ever since the solar system was formed, 5 billion years ago. Suppose the meteoroid is far from all planets and stars, so that the effect of gravity is negligible.
 
  Neglecting gravity, is any physical work being done on the meteoroid?
  A) No, because the force of inertia on the meteoroid is balanced by the equal reaction force by the meteroid.
  B) Yes, because work is always required to move any massive object through a distance.
  C) No, because no forces are exerted on the meteoroid.
  D) Yes, because the force of inertia is exerted on the meteoroid while the meteoroid moves.
  E) Yes, because the meteoroid is moving.

Question 2

In a physical fitness program, a woman who weighs 510 N runs up four flights of stairs in 22 s. Each flight rises 3.1 m.
 
  (1 hp = 746 W) (a) What is her total change in potential energy? (b) What was the minimum average power (in watts) that she expended during the 22 s? (c) What horsepower motor would be required to generate the same power?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rachel

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

C

Answer to Question 2

(a) 6.3 kJ (b) 290 W (c) 0.39 hp




rachel

  • Sr. Member
  • ****
  • Posts: 323

 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

For a complete list of videos, visit our video library