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

Author Question: A crane drops a 0.40-kg steel ball onto a steel plate. The ball's speeds just before impact and ... (Read 90 times)

yoroshambo

  • Hero Member
  • *****
  • Posts: 566
on: Jul 28, 2018
A crane drops a 0.40-kg steel ball onto a steel plate. The ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s, respectively. If the ball is in contact with the plate for 0.030 s, what is the magnitude of the average force that the ball exerts on the plate during impact?
 a. 87 N
  c. 3.0 N
  b. 116 N
  d. 3.5 N

Question 2

An electron with a speed of 2.0  106 m/s moves into a uniform electric field of 325 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest? (me = 9.11  10-31 kg, e = 1.6  10-19 C)
 a. 3.5  10-8 s
  c. 2.3  10-8 s
  b. 2.3  10-6 s
  d. 1.2  10-7 s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


yoroshambo

  • Member
  • Posts: 566
Reply 2 on: Jul 28, 2018
Gracias!

elyse44

  • Member
  • Posts: 319
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Daniel Burnham’s Flatiron Building (1902) was one of the first to use steel girders to hold up the b Daniel Burnham’s Flatiron Building (1902) was one of the first to use steel girders to hold up the b
Steel-toed shoes are a worthwhile investment to help prevent foot injury due to falling objects. ... Steel-toed shoes are a worthwhile investment to help prevent foot injury due to falling objects. ...
Use caution if using a steel scraper to remove a gasket from aluminum parts. It is best to use a ... Use caution if using a steel scraper to remove a gasket from aluminum parts. It is best to use a ...
Plate Tectonics Plate Tectonics
The impact of endocrine disruptor on animal The impact of endocrine disruptor on animal
Ball Illusion Ball Illusion
Video: Types of synapses - electrical & chemical

For a complete list of videos, visit our video library