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

Author Question: A soccer ball (mass = 0.43 kg) is moving at a speed of 20 m/s when it is kicked with a force of 300 ... (Read 66 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Jul 28, 2018
A soccer ball (mass = 0.43 kg) is moving at a speed of 20 m/s when it is kicked with a force of 300 N resulting in it going in the opposite direction with the same speed as before. What is the magnitude of the impulse delivered to the ball?
 a. 0, because the before and after momenta cancel each other.
  b. 8.6 kgm/s
  c. 17 kgm/s
  d. 2600 kgm/s

Question 2

A ping-pong ball covered with a conducting graphite coating has a mass of 2.5  10-3 kg and a charge of 4.0 C. What electric field directed upward will exactly balance the weight of the ball? (g = 9.8 m/s2)
 a. 6.1  103 N/C
  c. 5.1  106 N/C
  b. 2.0  10-7 N/C
  d. 1.2  104 N/C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

covalentbond

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

A


frankwu

  • Member
  • Posts: 549
Reply 2 on: Jul 28, 2018
Gracias!

daiying98

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

In American Progress (1872), John Gast depicts a feminized (and eroticized) America moving westward, In American Progress (1872), John Gast depicts a feminized (and eroticized) America moving westward,
A rubber mallet used to deliver a force to an object without harming the surface. A rubber mallet used to deliver a force to an object without harming the surface.
Mass Wasting Forms Mass Wasting Forms
finding the resultant force finding the resultant force
How do resultant force work among different angles? How do resultant force work among different angles?
Mass spectrometry for identifying an unknown protein isolated from a 2D gel Mass spectrometry for identifying an unknown protein isolated from a 2D gel
Video: Asthma Treatment

For a complete list of videos, visit our video library