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 158 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
Wow, this really help

DylanD1323

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Fault Movements at Plate Boundaries Fault Movements at Plate Boundaries
A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ... A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ...
Fall Velocity of Water Drops Fall Velocity of Water Drops
Plate Tectonics Plate Tectonics
The impact of endocrine disruptor on animal The impact of endocrine disruptor on animal
A piece of broken plate was dug up in an archeological site. It was put on top of the grid ... A piece of broken plate was dug up in an archeological site. It was put on top of the grid ...
Video: System organization - PPM system types (Somatic, Autonomic & Enteric) and Reflex arc types

For a complete list of videos, visit our video library