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

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 106 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
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
Answer to Question 1

C

Answer to Question 2

A




frankwu

  • Member
  • Posts: 549
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review


Dominic

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

For a complete list of videos, visit our video library