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

Author Question: A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that ... (Read 479 times)

mrsjacobs44

  • Hero Member
  • *****
  • Posts: 500
A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end. The ball moves so fast that the string is always taut and perpendicular to the velocity of the ball.
 
  As the ball swings from its lowest point to its highest point A) the work done on it by gravity and the work done on it by the tension in the string are both equal to -118 J.
  B) the work done on it by gravity is -118 J and the work done on it by the tension in the string is +118 J.
  C) the work done on it by gravity is +118 J and the work done on it by the tension in the string is -118 J.
  D) the work done on it by gravity is -118 J and the work done on it by the tension in the string is zero.
  E) the work done on it by gravity and the work done on it by the tension in the string are both equal to zero.

Question 2

An apple weighing 3 newtons hangs, motionless, from a tree branch. The net force on the apple is
 
  A) impossible to determine from the information that is given.
  B) 3 newtons upward.
  C) 6 newtons downward.
  D) 3 newtons downward.
  E) None of the above.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

xoxo123

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

D

Answer to Question 2

E





 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

For a complete list of videos, visit our video library